The correct answer is question.
B. enter by main gate
C. cause terror
The correct answer is (D) To question (formally and thoroughly); as, to interrogate a witness. To ask a question or questions of (person, etc.). To examine by questioning.
Interrogate comes from Latin rogare (to ask).
Examples of use:
- The detective interrogated all suspects.
- He was interrogated to determine his knowledge of the issues.