You tend to be more tired
I believe that A could be correct. The problem with C is that comma. Again, I'm not sure. You should wait for another person to help also. (I'm better at math.. Not English)
<em>I hope this helps!~
I will find someone else to help! :)</em>
The answer is most likely A because it looks like "over" is the only preposition used in any of these sentences.
