One end of a long metallic wire of length L is tied to the ceiling. The other end is tied to a massless spring of force constant k. A mass m hangs freely from the free end of the spring. The acceleration of the mass m is:
A) g) (k/m)L
B) g + (k/m)L
C) g) (k/m)L²
D) g + (k/m)L²