The correct answer is A. This is the case of using comma before a coordinating conjunction <em>and</em> because it links two independent clauses. We can observe that there two parts of this full sentence and each part is independent from each other. Both of them have their own subject and verb. Therefore, we are using a comma before <em>and</em>.
Answer:
D. am .. is.. are, was, were
First of all i don’t think it’s your fault she’s always mad at you. don’t go and instantly blame yourself. maybe talk to her? ask her why she says these things and ask where she’s coming from. she may be going through a hard time in her personal life and this has nothing to do with you, or maybe there is something that you could work on and with communication you guys could work through it. if there’s nothing or she doesn’t say anything then don’t blame yourself. when you’re feeling down and want to cry, reach out to another family member or a friend to calm you down and remind you that you’re not a burden. but i really would just try talking to her and open up to her about how her words make you feel. i hope things get better for you.