Problem: michelle deposited a certain sum of money in a savings account on july 1 st , 2007 . she earns an 12 % interest compounded semiannually . the sum of money in the account on december 31 st , 2009 is approximately what percent of the initial deposit ? 
Options: a ) 117 % , b ) 120 % , c ) 121 % , d ) 133 % , e ) 140 %
d