[单选题]
A cart with an initial velocity of 5.0 m/s experiences a 2 )d,8ppjz91xfmfkmn constant acbwf.vb5s3 b tt5-z5 gvceleration ofs.b5v wftbvzt53 5-b g $2.0 \; m/s^2$. What is the cart's displacement during the first 6.0 s of its motion?
A. $10 \; m$
B. $55 \; m$
C. $66 \; m$
D. $80 \; m$
