Task: Question Answering
Input (English): Problem: in a rectangular coordinate system , what is the area of a rectangle whose vertices have the coordinates ( - 4 , 1 ) , ( 1 , 1 ) , ( 1 , - 3 ) and ( - 4 , - 3 ) ? 
Options: a ) 16 , b ) 20 , c ) 24 , d ) 25 , e ) 30
Output (English): b