Contributing to cell membrane function, making bile acids essential for fat absorption, metabolizing fat-soluble vitamins, and making vitamin d are all functions of which nutrient? (a) protein.(b) carbohydrate.(c) cholesterol.(d) omega-3 fatty acids.

C. Cholesterol

Explanation:

Cholesterol maintains the fluidity of the cell membrane and thereby, regulates its function.

Bile acids are derived from cholesterol which serves as their precursor. For example, Taurocholic acid is a polar derivative of cholesterol. Bile acids serve in the absorption of fatty acids, glycerol, and fat-soluble vitamins as these compounds are non-polar in nature.  

Vitamin D is produced when the derivative of cholesterol, 7-dehydrocholesterol undergoes photolysis in skin cells in presence of sunlight.  

answer; ///i believe the answer your looking for is (ribosomes);

b. read the phase at the intersection of any given temperature and pressure.