Question

1. his ideas were debatable.

a reliable
b not beneficial
c disputable
d revived
e not valid

Explanation:

To solve this, we analyze the meaning of "debatable" and compare with the options. "Debatable" means open to debate or dispute.

• Option A: "reliable" means trustworthy, not related.
• Option B: "not beneficial" refers to lack of benefit, irrelevant.
• Option C: "disputable" means open to dispute, which is synonymous with "debatable".
• Option D: "revived" means brought back to life, unrelated.
• Option E: "not valid" means not acceptable or correct, different from debatable.

Answer:

C. disputable