Task: Question Answering
Input (English): Problem: joe went on a diet 4 months ago when he weighed 212 pounds . if he now weighs 188 pounds and continues to lose at the same average monthly rate , in approximately how many months will he weigh 160 pounds ? 
Options: a ) 3 , b ) 3.5 , c ) 4 , d ) 4.5 , e ) 5
Output (English): d