Mary has always been very healthy. Even though all her friends have been verysick with the flu this year, she does not feel like she needs to get a flu shot. Mary has what perception towards risk

C). Optimism bias

Explanation:

Optimism bias is described as the type of cognitive bias in which develops a prejudice that a negative or cynical event is less probably to be confronted by them. They have a biased optimism that nothing bad would happen to them which is not necessarily true. In the given example, Mary has this optimism-bias that she would not be diagnosed with flu and therefore, she does not find it important to get a flu shot.