Joel's main home is destroyed in a tornado in a federally declared a disaster area. The insurance company compensates Joel for his loss in 2013, which produces a $350,000 realized gain. How long does Joel have to purchase a new principal residence and avoid being taxed on the gain?
a. December 31, 2013
b. December 31, 2014
c. December 31, 2015
d. December 31, 2016
e. December 31, 2017