Mikell Has Been Thinking Over and Over Again About a Conflict

Mikell has been thinking over and over again about a conflict she has had with a coworker.As a consequence, she has allowed that stressful conflict to pervade her evenings and weekends when she is not at work.Her sister, Tori, also had a conflict with a coworker but seemed to forget about it almost immediately.When their classmates are catching the common cold, which of these two will be more vulnerable to catching the cold as well?

A) Mikell, because her elevated stress levels make her immune system less effective
B) Tori, because her happy-go-lucky nature makes her less cautious around those with the cold
C) Mikell, because her stress levels will cause her to seek out self-destructive situations
D) They will both be equally vulnerable to the cold.