Task: Question Answering
Input (English): Problem: there is 60 % increase in an amount in 6 years at simple interest . what will be the compound interest of $ 12,000 after 3 years at the same rate ? 
Options: a ) $ 2160 , b ) # 3120 , c ) $ 3972 , d ) $ 6240 , e ) none of these
Output (English): c