Answer: c) Availability heuristic.
Explanation:
Availability heuristic is defined as instant example or idea that occurs in mind relating with any particular situation or instance.This is used for analysis of situation, topic, method or judgement.
According to the question, availability heuristic is used for making decision whether to buy tomatoes or cumbers as per example of recipes .
Other options are incorrect because confirmation bias, representatives heuristics and anchor and adjustment heuristics not used for making decision between buying cucumber or tomatoes. Thus, the correct option is option(c).