Correct Answer:
D. Suspicious
The antonym of "Credulous", meaning easily believing, is "Suspicious", which implies distrust or doubt. "Gullible" is a synonym, while "Crash" and "Sadness" are unrelated terms, making them incorrect distractors.
The antonym of "Credulous", meaning easily believing, is "Suspicious", which implies distrust or doubt. "Gullible" is a synonym, while "Crash" and "Sadness" are unrelated terms, making them incorrect distractors.