Leo Williams is single and 45 years old. Leo works as an IT manager and his Form W-2 shows wages of $47,250. Leo participated in his employers self-only coverage High Deductible Health Plan (HDHP) all year. Leo does not have any other health coverage. Leo has had an HSA for two years. Leos employer contributed $1,500 in 2017 to Leo's HSA. In 2017, Leos Aunt contributed $2,000 to Leo's HSA. Leo is a U.S. citizen and has a valid Social Security number.

What amount will Leo use to compute his HSA deduction on Form 1040, line 25?

A. $0

B. $1,500

C. $2,000

D. $3,500