Which word is inserted before 'claim of trial error' in the revised sentence?

• A. valid
• B. legitimate
• C. proper
• D. credible

Answer: (A)

In legal writing, the word you place before “claim of trial error” should convey that the assertion has legal bite and is procedurally sound. The best choice is to use the word "valid," because it signals that the claim meets the necessary legal standards and can be reviewed on appeal. A valid claim indicates there is enough legal basis and factual support to warrant consideration by the court.

Using "credible" would focus on how believable the claim or the underlying evidence appears, not on its legal sufficiency. "Legitimate" can work in broader contexts, but in precise legal drafting "valid" is the standard way to express that the claim is legally enforceable or acceptable for review. "Proper" emphasizes propriety or correctness of form, which is a weaker signal about the claim’s legal authority.

So the revised sentence naturally reads with a valid claim of trial error, signaling that the assertion meets the required legal criteria to be entertained.