Answer: The answer is A. To make a complaint.
Step-by-step explanation:
For what is shown on the picture, it seems like the writer is making a complaint on a product they had recently purchased, the ReadyBot. They state that it functioned at first, but suddenly stopped working after a couple of uses. That's one key negative of the review, meaning one of the parts that help us figure out that this is a complaint. "This is simply unacceptable" also gives off a negative connotation (tone). "I have included a negative review.." Negative is obviously bad. We can piece these clues all together to figure out the main context.
We can rule out the last two options for sure, since they seem to have no match to the shown context whatsoever. The letter is not to request information or to make an introduction.
Sometimes, multiple choice problems such as these like to leave you with two clearer answer choices, the correct one and one that may have you thinking that answer may be right. In this case, it seems to be the first two. However, although it may seem like they are giving feedback, in this case, it's negative. Negative feedback in other words is just a complaint. And since it says to choose the best answer choice, a complaint, A, would be the best answer choice.
In all, the overall content of the letter seems to be a negative review of a defective product. Think of it like an Amazon review. This would be a complaint.
Hopes this helps!