Art's At-Risk Amount in a Passive Activity Was $60,000 at the Beginning

Art's at-risk amount in a passive activity was $60,000 at the beginning of 2012.His loss from the activity in 2012 is $80,000,and he had no passive activity income during the year.Art had $20,000 of passive income from the activity in 2013.Under the passive loss rules,Art's suspended loss at the end of 2013 is:

A) $15,000.
B) $20,000.
C) $45,000.
D) $60,000.
E) None of the above.