Question

what heuristic estimates the probability of something occurring based on how easily one recalls relevant occurrences of the event?
representativeness
expected value
subjective utility
availability

Explanation:

The availability heuristic is a mental shortcut that estimates the probability of an event based on how easily relevant examples come to mind. Representativeness heuristic is about judging similarity to a prototype. Expected value is a statistical concept in probability. Subjective utility pertains to personal - perceived value.

Answer:

D. availability