A farm grew 19.8 tons of wheat in 2013. The farms wheat output increased by 9.8% from 2013 to 2014 and by 5.1% from 2014 to 2015. Which expression represents a strategy for estimating the total output of wheat ,in tons, in 2015?
A 20+10+5
B 20(10)(5)
C 20+1.1+1.05
D 20(1.1)(1.05)