Task: Question Answering
Input (English): Problem: in a rectangular coordinate system , what is the area of a rectangle whose vertices have the coordinates ( - 3 , 1 ) , ( 1 , 1 ) , ( 1 , - 2 ) and ( - 3 , - 2 ) ? 
Options: a ) 12 , b ) 24 , c ) 20 , d ) 30 , e ) 36
Output (English): a