Answer:
it would be "How many children are affected by natural disasters every year?"
Explanation:
While the cousin would have experience with the other three and would therefor have answers, Unless she was a professional she would not know the answer to the third.
I think the correct answer should be the Letter A.
For this item, I will go with the first option, "What is the authors purpose in writing this piece?". This is important to ask in first read of a multi-draft reading process because if we desire to know something about the subject, it is important to note how the reading material would be of help to us and we know that by the purpose of the author.
This question has no answer because it does not give any information on the letter, Juans situation, or anything other than the fact that he is sending a letter