You would need to introduce a list.
For example you could have: My shopping list contains of; milk, bread, and yogurt.
Another purpose is to separate clauses.
B. an original research report
Personally, the option I would choose is D. exonerated: out of, to complete the analogy. My reasoning would be that when you are carried by emotions, you are elated, the same way that when you are exonerated, you are deposed, or out of a certain service.
However, the answer that I found people saying is correct all over the Internet is C. coherent : to place, so, I don't know whom you should believe, sorry. :/
You should write about when you first started taking care of the pet and fedding it and playing games with the pets toys and how you watched it