The correct answer is B. This answer contains a summary of the advantages of cloud storage, which can be developed in the essay as it was stated in the main claim. Also, this answer compares the advantages of cloud storage over traditional data storage; this detail was mentioned in the main claim, and it is restated in the conclusion. None of the other answers contain information restating what was directly said in the claim.
I think the answer is D sorry if wrong
Answer
A. Informal
Explanation
Informal outlines can take the form of brief lists of ideas in the order in which you want to discuss them.