Prepare and arrived would be the verb
A letter to a teacher or a doctor
Swap 2 with one then 1 and 4 then 4 and 3
D. First person pov, it is where you are the main character, and it includes the pronouns of I and me when talking about actions the main character is doing. You are only privy to that person's thoughts and point of view.
I am not one hundred percent sure but i would say the indian caste system and the partition of india