The effects of relaxation include A. improved problem-solving ability because the mind is not exhausted from
staying alert
B. shallow breathing to move oxygen in and carbon dioxide out faster.
C. increased blood pressure to move blood from the limbs back to the core.
D. improved vision because the pupils return to their normal size.

A

I believe it's A: improved problem-solving ability because the mind is not exhausted from staying alert.

she forgets to repeat her message as often as necessary

exposure to hazardous carcinogens and toxic substances can cause breathing problems, such as copd and various types of cancer. it also increases the risk of heart attacks and strokes and has serious (but no less unattractive) side effects, such as aging, yellow teeth, a terrible smell and damage to the vocal cords.