Firstly, Conditional past real mood is a statement where one explains what they would have done if some event had occurred, or what could happen, in other words, a theoretical action. The tense will be dependent on the action. Therefore, the only one that fits is C "If I had homework, I would have studied at the library." I properly states their theoretical scenario in which they had homework.
I believe Its the first one.
Answer:
B
Explanation:
The reason is because the sky overcast system is to go into the sky and try to figure out the wheater which would be a dependent clause in this situation please let my know if im wrong :) hope it helps