Mr and Mrs

Mr. and Mrs. Clyde were married for 21 years before Mrs. Clyde divorced her husband in 2013. This year, the IRS determined that the Clydes underpaid their 2013 tax by $19,650. In which case would Mrs. Clyde be relieved of liability for the underpayment under the innocent spouse rule?

A) Mrs. Clyde did not read through the Form 1040 before she signed it.
B) Mrs. Clyde remarried this year and is now Mrs. Novak.
C) Mr. Clyde was the sole income earner during the entire marriage.
D) None of the above.