Arrange language units from smallest to larger groupings: Items: (A) Letter (B) Phrase (C) Word (D) Sentence Choose the correct smallest-to-largest sequence.

Introduction / Context:
The task checks structural knowledge of written language. We must place linguistic units by how they combine to form larger constructs.

Given Data / Assumptions:

• A = Letter (atomic symbol).
• C = Word (letters combined).
• B = Phrase (a group of words without complete predication).
• D = Sentence (complete thought, often containing one or more phrases).

Concept / Approach:
Use the “part-of” hierarchy: letters → words → phrases → sentences.

Step-by-Step Solution:

Verification / Alternative check:
A sentence can contain multiple phrases; reversing phrase/sentence breaks containment logic.

Why Other Options Are Wrong:

• A,C,D,B: puts sentence before phrase.
• Other sequences similarly violate the composition hierarchy.

Common Pitfalls:
Confusing grammatical importance with structural size.

Final Answer:
A, C, B, D