Question

what is the purpose of comparison shopping?
ensuring you are not buying out of emotion
attempting to find the best deal on a product
determining whether you truly need a product
reading reviews to make sure a product is good

Explanation:

Comparison - shopping involves looking at different sellers and offers for a product. The main goal is to get the best value for money, which means finding the best deal on a product. While other options like not buying out of emotion, determining need, and reading reviews can be part of the shopping process, they are not the core purpose of comparison - shopping.

Answer:

attempting to find the best deal on a product