Identify the part (A–E) that contains a grammatical error in the sentence below. If there is no error, choose option E (No error). Sentence (split into parts): A) As always have been said, B) parents should not C) impose their desires D) on their wards.

Introduction:
The sentence tests subject–auxiliary order in passive constructions placed before the main clause.

Given Data / Assumptions:

• Introductory passive clause.
• Main clause advises against imposing desires.
• Standard formal register.

Concept / Approach:
Correct passive perfect expression is "has always been said" (singular impersonal subject understood). The sequence "As always have been said" is ungrammatical.

Step-by-Step Solution:
1) Determine intended meaning: a general saying.2) Use singular auxiliary: "has".3) Correct phrase: "As has always been said, parents should not impose their desires on their wards."

Verification / Alternative check:
Alternate style: "As people have always said" (plural subject) is also correct but changes meaning.

Why Other Options Are Wrong:
B: Modal "should not" is correct.C: Verb "impose" correctly governs object "desires".D: Preposition "on" is appropriate.

Common Pitfalls:
Confusing "has/have" in impersonal passive expressions.

Final Answer:
A (Write: "As has always been said, ...")