Darla Sold an Antique Clock in 2015 for $3,000

Darla sold an antique clock in 2015 for $3,000.She had purchased the clock in 2009 for $2,000.If she is otherwise in the 33% marginal tax bracket,what is the maximum tax rate on the capital gain on the sale of the clock?

A) 33%
B) 15%
C) 28%
D) 20%