_is found on the red blood cells and gives blood it’s type

The characteristic of stress responses that refers to the degree or extent of the behavior is a. intensity. b. frequency. c. duration. d. stress.

What should be changed to make the following sentence true? "the stress model suggests that people with a predisposition for a disorder are more likely to develop the disorder when faced with stress."

True or false: a person who practices delayed gratification is taking a step towards his or her health.