Monica Has a Roth IRA to Which She Contributed $15,000

Monica has a Roth IRA to which she contributed $15,000. The IRA has a current value of $37,500. She is 54 years old and takes a distribution of $25,000. How much of the distribution will be taxable to Monica?

A) $0
B) $10,000
C) $15,000
D) $25,000
E) $37,500