The correct answer is confuse.
The correct answer is (A) To confuse; to bewilder; to mislead; to perplex; to mix up. Also, to disorder; to contradict or refute; to defeat.
Confound comes from Old French confondre, Latin confundere (mingle, mix).
Examples of use:
- What happened during the following week confounded his vacation plans.
- The directions that accompanied his son's Christmas toy confounded him.