[单选题]
A mass on a spring undergoes SHM. When the ma.pykas - ucmm5//qt ;wss is at its maximum disp(ib 6sxf7 r k)1mu)zrolacement from equilibrium, itsu so)7fr i)1 r6z(bkxm instantaneous velocity
A. is maximum.
B. is less than maximum, but not zero.
C. is zero.
D. cannot be determined from the information given.
