[单选题]
If the velocity versus tim3rds 0frb ryln2c15mps8z .zht81 k: n-2diiycf4. ib e graph of an object is a horizontal line, the object isfid y4bi .c-i2
A. moving with constant non-zero speed.
B. moving with constant non-zero acceleration.
C. at rest.
D. moving with infinite speed.
