What can the writer do to improve the format and structure of this letter of complaint? the format and structure of the letter is correct as is. the sender's name should be removed from the top, and the first paragraph should be indented. the sender's name and address should be removed from the top. the body should have more details about why the store wouldn't exchange the system.

There is no letter available for viewing, however, I would just answer it the way how a proper letter of complaint is supposed to be written. The sender's name should be removed from the top and the first paragraph should be indented. This is the only best answer that could fit your question because the rest of your choices seem to complete the thought of a letter of complaint.

The correct answer is D, between sentence five and six

Explanation:

The best place to add an example of how her sister is like a friend is between the sentences five and six, because it is there where she is talking about her sister´s characteristics as a friend and those things that make her a good friend, she could continue with the description of her characteristics between these two sentences.