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)?	Choose the correct choice from the following answers.
A) 16
B) 20
C) 24
D) 25
E) 30
Length of side 1= 4+1= 
<gadget id="calculator">4+1</gadget>
<output>5</output>
5   Length of side 2= 3+1= 
<gadget id="calculator">3+1</gadget>
<output>4</output>
4   Area of rectangle= 5*4= 
<gadget id="calculator">5*4</gadget>
<output>20</output>
20   20 is the answer
<result>B</result>
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)?