Rearrange the parts of the sentence to form a coherent statement. Williamson shoveled scorn on P - the low income white Republican voters who, Q - were most responsible for the rise of Trump R - as he saw it,

Introduction / Context:
This question tests your ability to rearrange sentence fragments into a logically and grammatically coherent statement. The sentence describes Williamson directing scorn at a particular group of voters and includes a parenthetical comment as he saw it. You must choose the correct sequence of the labelled parts P, Q and R.

Given Data / Assumptions:
Main clause: Williamson shoveled scorn on ...
P: the low income white Republican voters who,
Q: were most responsible for the rise of Trump
R: as he saw it,
You must order P, Q and R after the main clause to form one complete sentence.
The final sentence should maintain natural English word order and punctuation.

Concept / Approach:
The noun phrase the low income white Republican voters who introduces a relative clause beginning with who. The relative clause should be completed by a verb phrase such as were most responsible for the rise of Trump. The parenthetical phrase as he saw it modifies the entire judgement about responsibility and is best placed between who and were to show that it expresses Williamson personal view. The logical order is therefore P, then R as an inserted comment, then Q to complete the relative clause.

Step-by-Step Solution:
Step 1: Start from the fixed part: Williamson shoveled scorn on ... Step 2: Part P provides the object of on: the low income white Republican voters who. This must come first among the three parts. Step 3: After who, we need a verb phrase, but R, as he saw it, is a common kind of interrupting comment. Step 4: Insert R after who to signal that what follows is his personal perception: Williamson shoveled scorn on the low income white Republican voters who, as he saw it, ... Step 5: Now complete the relative clause with Q: were most responsible for the rise of Trump. Step 6: The full correct sentence is Williamson shoveled scorn on the low income white Republican voters who, as he saw it, were most responsible for the rise of Trump, which corresponds to the order PRQ.

Verification / Alternative check:
Try other orders. For example, RQP would give as he saw it, were most responsible for the rise of Trump the low income white Republican voters who, which is ungrammatical. Orders starting with Q also fail because were most responsible cannot directly follow on without an object. Only PRQ allows a smooth and natural sentence that respects relative clause structure and the parenthetical comment.

Why Other Options Are Wrong:
RQP begins with as he saw it, leaving no clear object for shoveled scorn on and placing who at the end, which is incorrect.
QPR starts with were most responsible, which cannot immediately follow on and leaves who hanging at the end of the sentence fragment.
QRP likewise misplaces the verb were and the relative pronoun who, resulting in an incoherent sentence.

Common Pitfalls:
Many learners struggle with interrupting phrases such as as he saw it and misplace them at the beginning or end of the sentence. Remember that such comments are often inserted in the middle of a clause, especially after a relative pronoun, to show that the judgement is subjective.

Final Answer:
The correct order of the parts is PRQ.