[单选题]
A force moves an object in the direcx/v8 e ukhx fi2/kxjzi.: yup/ g+u0v(tion of the force. The grapms;x. a vs:wvjdn-):x h in Fig. 6-1 shows the force versus the object's position. Find the work n - );a:sm xsvx:jw.vddone when the object moves from 0 to 2.0 m.
A. $20 \; J$
B. $40 \; J$
C. $60 \; J$
D. $80 \; J$
