Some Smoothie Bars Have the Option to Add Extra Vitamin

Some smoothie bars have the option to add extra vitamin C to smoothies that already contain the daily recommended value.Vitamin C is a polar molecule.Why is it unnecessary to add more than 100 percent of vitamin C recommended values to a food?

A) Vitamin C is water-soluble and can accumulate in the body
B) Vitamin C is fat-soluble and can accumulate in the body
C) Vitamin C is water-soluble and excess is passed as urine
D) Vitamin C is fat-soluble and excess is passed as urine