Which of the Following Is a Feature of Sodium Nutrition

Which of the following is a feature of sodium nutrition?

A) It has no AI because diets rarely lack sodium
B) It has no AI because the kidneys are highly efficient at regulating sodium balance
C) The AI is 3 g,an amount that has been shown to have little or no effect on blood pressure
D) The AI for young adults is only 1500 mg because the body possesses an unusually efficient retention mechanism