Who is a proctor in an exam setting?

• A. A student.
• B. A computer program.
• C. A teacher's aide.
• D. A supervisor of an examination from a school.

Answer: (D)

A proctor is the person responsible for supervising an exam to keep things fair and orderly. This role involves overseeing the test, checking identities, distributing and collecting materials, enforcing rules and time limits, and watching for cheating or irregularities. That responsibility is typically held by a supervisor of the examination from the school, an official who is designated to oversee the test.

That’s why this option fits best: it describes the formal, school-centered supervisory role. The other choices don’t match as well. A student is a test-taker, not a supervisor; a computer program can assist in some settings but the traditional proctor is a human supervisor; a teacher’s aide can serve as a proctor, but the question points to the formal supervisor from the school.