At which diastolic blood pressure should a personal trainer be concerned about hypertension in a client and refer them to a physician as they may be "pre-hypertensive?"
a. less than 80 mmHg
b. greater than 120 mmHg
c. between 80 and 89 mmHg
d. between 70 and 79 mmHg
e. greater than 90 mmHg
Answer: C