Mrs Hepp Completed Her 2017 Form 1040 on April 13

Mrs Hepp completed her 2017 Form 1040 on April 13, 2018. The return showed a $923 balance due. Mrs Hepp needs more time to double check all her computations. What can Mrs Hepp do to give herself more time?

A) She can do nothing because the Form 1040 must be filed by April 17.
B) She can file a request by April 17 for an automatic extension of time to file her Form 1040 and to pay the balance due.
C) She can file a request by April 17 for an automatic extension of time to file her Form 1040 and pay the $923 estimated balance due with the extension request.
D) She can file a late Form 1040 without penalty as long as she mails the return before May 17, 2018.