This is a hard one and I can see why you decided to post it here. B is most definitely wrong but the other three are all neck and neck. There are both even pros and cons of A and C but I think it would be more reasonable to adopt a general routine. So I think the answer would be C.
It is dark because Barnardo has trouble seeing the other guard.
This scene takes place at midnight and it is so dark Barnardo cannot see the other guard. Barnardo shows up for his shift, but he can't clearly make out who Francisco is. Francisco has the same problem because instead of answering Barnardo he tells him to identify himself first. They get it figured out and Barnardo begins his shift.
The correct answer is "until".
This is because her opinion changed when she found out what the school would be like. This is why we use until.
This answer is c!!!!!!!!!
The Secretary of the Treasury acts as a principal advisor to the President and the Cabinet on economic issues. The United States Department of the Treasury, which the secretary oversees, performs many important functions, including paying the nation's bills, printing money, and collecting taxes.
