The correct answer is C. The essay is going to be long, and point-by-point writing makes it easier for the writer to keep track of the details if the differences and similarities between the two careers are discussed one point at a time.
Explanation:
Point-by-point is a type of organizational structure used in compare and contrast texts, in this, the author analyzes and discusses one point of the two subjects the author is comparing and contrasting. This implies in the case of Karina that she analyzes different points of both Veterinary medicine and dentistry for example points such as job opportunities, abilities required, salary, benefits, drawbacks, etc.
Additionally, this type of structure is more appropriate for her, because this essay is likely to be long and it is easier to organize the information point by point. Thus, the best reason to sue Point-by-point, in this case, is that "The essay is going to be long, and point-by-point writing makes it easier for the writer to keep track of the details if the differences and similarities between the two careers are discussed one point at a time."