Answer answer them and do it in order

which

corras is the only one that is informal but doesn't follow the suffix rule. correr is the verb. corre is the formal verb form. corra would be used as the formal is corre ended with an a.

your best bet would be corras, it's the only one that is informal but is still wrong

c. estaremos llegando

why? because it’s talks about us so you need to use the proper term. estaremos refers to us. it translates to “next next day at this same hour we will be arriving at the house.”