The HIV virus has caused more deaths in developed countries. （）

A．Stress has both positive and negative aspects.
B．Stress is only a positive reaction of the body to pressure.
C．Stress only leads to serious problems.
D．Stress is unavoidable as part of our nature.

A. to the proper function of your memory
B. is called long-term memory
C. the capacity to store what you have learned
D. belongs to every long-term memory
E. the ability to remain mentally healthy
F. for younger and older people