The Graph Here Represents a P-V Diagram Where the X

The graph here represents a p-V diagram where the x axis is the volume in units of 10^-3 m³ and the y axis is the pressure in units of 10⁵ N/m². The work done by the ideal gas as it follows the path sequence A to B to C to D back to A along the lines indicated is

A) 80 kJ.
B) -80 kJ.
C) 20 kJ.
D) -20 kJ.