The sentence about telling someone is used to tell about the timing of the examination. The sentence what time the exam was is the correct blank. Thus, option d is correct.
Past tense is a type of tense that denotes the activity or the action that has already occurred or existed previously. It is used in the grammatical language to indicate how far time has passed since the action occurred.
Hadn't told is a word that denotes the past tense. The information that was supposed to be delivered was not given at that time. Like in the last sentence, the information about the exam time was not delivered to the person.
Therefore, option d. 'what time the exam was,' fits the blank.
Learn more about past tense here:
https://brainly.com/question/15892426
#SPJ2
