A Decoration, of Mass M, Is Suspended by a String

Multiple Choice

A decoration, of mass M, is suspended by a string from the ceiling inside an elevator. The elevator is traveling UPWARD with a constant speed. The tension in the string is

A) less than Mg.
B) equal to Mg.
C) greater than Mg.
D) impossible to tell without knowing the speed.
E) impossible to tell without knowing the decoration mass.