This is an optional writing question. But, if you can't figure out what to write about i suggest maybe a fictional story about "your" dying dog and you saved its life. Something easy and believable.
I am very honored that you asked me to pray for somebody that is in danger of something that is very brutal. I will remember to keep them in my prays. Hope (Name) feels better!
The best way to rewrite the roundabout expression "for the period of two weeks" is either "A" or "B". Sorry I picked two. I just didn't know which one to pick. But it is definitely not "C" or "D"
Compare and contrast would be your answer.