[单选题]
An object of mass m is hanging by t (mhxg2yr*;5beevg) a string from the ceiling of an elevator. p9v8wtn 45p v0;eghl u The elevator is moving upward, but slowing down. What is the t98e wvnlp ;tgv54h u0pension in the string?
A. less than mg
B. exactly mg
C. greater than mg
D. zero
