The only preposition in the options available to you is of, so the correct answer is C.
A) and B) are conjunctions.
D) is an adverb.
A. concise.
Eliminating unnecessary adverbs will make a sentence easier to understand, while still giving information clearly.
Answer:
Dear Friend,
How are you doing these days? The whole pandemic experience sure has been a tough time for everyone. My family and I had to stay indoors because of the virus growing quickly. It was not easy at all. We could not go out for weeks. After every week, a new rule regarding the pandemic would come out. Each day would go by tougher than the last. After two weeks in quarantine, my family and I were finally allowed to leave the house. We did our grocery shopping at last. Sadly, when we arrived at home my dad appeared quite sickly. We had to quarantine once again but thank god we had done our shopping that day. He turned out positive and we had to quarantine for another two weeks. After that things got easier. We were able to go out again. Right now the rules regarding the pandemic are less strict than before because we have less cases on the virus. How was your experience during the coronavirus pandemic? Are you and your family doing well right now? It's been really long since we had a real good conversation. I expect to hear back from you doing well. I hope that you and your family are safe and free from worries.
Sincerely,
Date.
First name and Last name.
(That's how I would do it...I hope It helped)
