The answer is B. "had run" is a verb in the past perfect tense. To determine the tense of a verb, you need to look at the auxiliary (helping) verb that is used. In this case, the auxiliary verb "had" is used before the main verb "run." The past perfect tense is used to indicate that an action was completed before another past action or point in time. In this case, the action of running (run) occurred before another past action or point in time.
