[单选题]
A mass on a spring undergoesp amgi35sw,887tco: k/ 1sfshpa5y8pky i +rj SHM. Wh tlqq ybo4mzz*:b/:i5en the mass is at maximum displacement from equi qy q*5bb/:4o it:mzlzlibrium, its instantaneous acceleration
A. is a maximum.
B. is less than maximum, but not zero.
C. is zero.
D. cannot be determined from the information given
