The memoranda _ not important.

Correct Answer: (D) are Subject-verb agreement with irregular plural nouns is a frequently tested grammar point in NTRCA exams. Key Concept — "Memoranda": — "Memorandum" is a Latin word meaning a written note or official communication — Singular: memorandum — Plural: memoranda (Latin plural form) — Since "memoranda" is already PLURAL, it takes a plural verb → "are" Rule: Plural subjects take plural verbs: "The memoranda are not important." ✓ Similar Latin/Greek Plurals: — Datum (sing.) → Data (plural) → "The data are accurate." — Criterion (sing.) → Criteria (plural) → "The criteria are clear." — Phenomenon (sing.) → Phenomena (plural) → "The phenomena are strange." — Curriculum (sing.) → Curricula (plural) — Memorandum (sing.) → Memoranda (plural) Why others are wrong: ✗ "is" — singular verb, but memoranda is plural ✗ "has" — wrong auxiliary verb form ✗ "have" — for subjects like "they/we/you"; memoranda needs "are" not "have" Source: English Grammar — Wren & Martin; NTRCA Question Bank.