Which of the following statements are true about "RMR"? Select all that apply. 

Select one or more:

a. RMR stands for "Reactive Measured Response" and states how many calories are burned during exercise

b. A person is born with a specific RMR that does not change

c. RMR stands for "resting metabolic rate"

d. RMR is affected by body size and composition

e. According to the textbook, the brain utilizes 20% of the calories burned at rest (making up 20% of a person's RMR).