In the passage, the word "dedicated" most nearly means: "He was a dedicated researcher who spent long hours in the lab."

Step-by-step solution

1. Identify the word "dedicated" in the passage.
2. Recall that "dedicated" means devoted or committed.
3. Select the option that matches this meaning.
4. Answer: committed.

Concept tested: Word meaning

Published 31 August 2026 · How this solution was prepared and checked

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