[单选题]
A force moves an object in the g cot/,8slpan245z0kxdk- xv direction of the force. The graph in Fig. 6-1 s+kaxn i(: s76wme0zofs2q0h shows0k qi sw6z: 2 s7x(0hsonfm+ea the force versus the object's position. Find the work done when the object moves from 0 to 2.0 m.
A. $20 \; J$
B. $40 \; J$
C. $60 \; J$
D. $80 \; J$
