Answer:
Sorry for taking up an answer space, but many of us haven't taken the test you are referring to, and can't see the paragraph necessary to complete the question. If you put the paragraph in the question as well, it would be far more likely to be answered quickly and thoroughly.
Answer:
The door was opened by who?
Explanation:
The sentence in the question is denoted in the active voice. The active voice is that wherein the subject performs the action on the receiver.
The revised sentence above is in the passive voice. Here, the subject receives the action. The subject in this case is the pronoun 'who'. At first, it performed the action of opening the door. In the revised voice above, it receives the action of opening the door. The change in the sentences above show the differences between the active and passive voice.
B.... cause c and d are for sure wrong
The answer is C
it just is also i took the same thing
D. Snowboarder is your answer