During the Period from 2008 to the End of 2009

During the period from 2008 to the end of 2009, Innovation, Inc.spent $90, 000 on research and development for an invention that was patented on January 1, 2010.Innovation estimated that the patented invention would be useful in its production for 10 years.At the beginning of 2012, Innovation paid $16, 000 in legal fees in a successful defense of the patent.What is Innovation's patent amortization expense for 2012?

A) $25, 000
B) $11, 000
C) $10, 600
D) $ 2, 000