The correct answer is C. Everybody missed the first bus.
A. The first bus was missed by everybody?
This sentence is in the passive voice, which means that the subject of the sentence is not performing the action. In this case, the subject is “the first bus,” but the action is being performed by “everybody.” This sentence is grammatically correct, but it is not as clear as it could be.
B. Was the first bus missed by everybody?
This sentence is also in the passive voice, but it is a bit clearer than the previous sentence. The subject is still “the first bus,” and the action is still being performed by “everybody.” However, this sentence does not specify who missed the bus.
C. Everybody missed the first bus?
This sentence is in the active voice, which means that the subject of the sentence is performing the action. In this case, the subject is “everybody,” and the action is “missing the first bus.” This sentence is the clearest and most concise of the four options.
D. Had the first bus been missed by everybody?
This sentence is in the past perfect tense, which means that the action happened before another action in the past. In this case, the action of “missing the first bus” happened before the action of “everybody arriving.” This sentence is grammatically correct, but it is not as clear as the other options.