Answer:
b. in situations requiring the purchase of a product for the very first time.
Explanation:
the purchasing process by first time is the most complicated election, because people usually want to buy the best product with the best specifications for the lowest price, but the real hard fact is the comparison between products take a lot of time and those elements are intrinsic in the purchase decision, for that reason,this is the best situation to use the heuristic strategy with the objective to solve the purchase decision problem with methods, step by step.