Fred, age 36, files single. He earned $46,875 in wages and had no other income in 2014. On April 14 of 2015, he filed for an automatic six-month extension to file his tax return. On May 20, he timely filed his 2014 tax return. Which statement best describes his eligibility to contribute to an IRA on May 20?

A) Because he did not make the contribution before the due date for the tax return, he is not eligible to make an IRA contribution for 2014.

B) Because he did not file his tax return by the due date, he is only eligible to contribute to a Roth IRA for 2014.

C) Because he did not file his tax return before the due date but did file it before the extension due date, he is eligible to make half the maximum IRA contribution for 2014.

D) He is eligible to make the maximum IRA contribution because he filed his 2014 tax return before the extension due date.