This is an inference of time. So A is the correct answer
The type of error in the given sentence above is option C. It contains no error. The given sentence's structure is correctly written and the objects of the sentence are also parallel. The word "swimming" in the sentence is a gerund and is not used a verb. Therefore, "to do homework and swimming" is correct.
Actually Washington built Fort Necessity
B I believe, because indirect characterization is describing a person through their personality, actions, etc.! Hope this helps!