[单选题]
A cart with an initial velocity ofcc ulir84:,xh(,9ic ;e f tl-j8jl vko 5zq9fb i4y-u ild*1kz d+ukjpmy. h2(; .0 m/s experiences a constant acceleration of *29i z1imu qy4dk-b(y +jk.fh;dluzp. What is the cart's displacement during the first 6.0 s of its motion?