[单选题]
A 2.0-kg mass is hung from a springrs /brukk, 6/ny+xmq+6 d,t ejo c96us of spring 2:paod9ts6b9 jxo l3t constant 18 N/m, displaced slightly fro:s lt2xtao 6b93 pod9jm its equilibrium position, and released. What is the frequency of its vibration?
A. $0.48 \; Hz$
B. $0.95 \; Hz$
C. $1.5 \; Hz$
D. none of the above
