Final answer:
Minor everyday stressors like taking an exam temporarily alter the immune system by boosting innate immune responses at the possible expense of adaptive immune responses. Chronic stress can lead to a more pronounced suppression of the immune system and increased susceptibility to some diseases. The correct choice is O temporarily alter immune system.
Step-by-step explanation:
Minor everyday stressors such as taking an exam can temporarily alter the immune system. Short-term stress has been found to divert the body's resources towards enhancing innate immune responses, which act quickly and may help the body prepare for immediate challenges.
However, this diversion of resources can weaken the adaptive immune response, leading to potential issues in fighting diseases. Conversely, chronic stress can have a more significant negative effect on immune function, suppressing both innate and adaptive immunity, and potentially leading to an increased incidence of some diseases.