The correct answer is C. I knew that I did well on the test
Explanation:
Simultaneous events means when two events happen at the same time, it means there is no a difference in time between one event and the other, this simultaneity in language is usually expressed in the tense used to express the action or event, in this way, if the same tense is used to express two actions it is more likely those actions are simultaneous, as different tenses would express an explicit difference in the time the actions occurred. In the case of option C. "I knew that I did well on the test", both actions which are "I knew" and "I did" are in simple past, which make them simultaneous, also it is possible both actions occurred at the same time as both actions can be carried out by a person at the same time. Thus, the sentence that expresses simultaneous events is C. I knew that I did well on the test, as it is the only option in which both actions are in the same tense and these actions can occur simultaneously.
