[单选题]
An object is moving at constay+4 4 0zy lkx k8(hl;mxnxxgy6nyder s n7:am; (je:,fk(rcu ;gnnq zf9sd.a; ;t velocity. Which of the following could be the free-body diagram representing the forces acting on the object?ec,r:fsm;ndun . j:7d;9ayefg;aq;k(znsr (