A nursing student is preparing to instruct a pregnant client in performing Kegel exercises. The nursing instructor asks the student the purpose of Kegel exercises.
Which response made by the student indicates an understanding of the purpose? Select all that apply.

1. "The exercises will help reduce backaches."
2. "The exercises will help prevent ankle edema."
3. "The exercises will help prevent urinary tract infections."
4. "The exercises will help strengthen the pelvic floor in preparation for delivery."

4. The exercises will help strengthen the pelvic floor in preparation for delivery.

Explanation:

Kegel exercises is done to strengthen the pelvic floor muscles so that it can support uterus, bladder, small intestine and rectum firmly.  

This exercise can also be referred as pelvic floor muscle training.  

If the nursing student gives the above facts stating the purpose of Kegel exercises, then the nursing instructor would understand that the student has well understood the purpose of  Kegel exercise.

Hence, option 4 is correct

b. the carbon cycle ensures living things have a source of hydrogen