Which of the Following Is False About Vitamin D Deficiency

Which of the following is false about Vitamin D deficiency?

A) This nutritional deficiency is caused primarily by lack of exposure to sunlight.
B) Vitamin D deficiency is associated with increased risk of schizophrenia.
C) The majority of teens and adults in the U.S. are deficient in Vitamin D.
D) The use of sunscreen does not contribute to Vitamin D deficiency.