Health authorities agree that the desirable storage fat level should be percent for men and percent for women.

a. 3 to 5; 8 to 12

b. 6 to 8; 13 to 17

c. 8 to 12; 16 to 20

d. 8 to 20; 8 to 20

Option C

Explanation:

The body varies from men to women depending on the optimal fitness, body performance , activity and epidemiology

As such the men should have fat between 10 % to 25 % while female should have fat between 18 %  to 30 %

For athletic men and women this fat range is further lower because of the high level fitness requirement.

Hence, option C is correct

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cell regulation is conducted by special proteins.

ionic bonds are two oppositely charged ions that attract. a sodium ion has a 1 positive charge; a chloride ion has a 1 negative charge. sodium and chloride have oppostive charged ions that attract which forms an ionic bond. a chemical bond formed when two atoms share electrons is called