[单选题]
Figure 11-2 is a "snapshot" of a wave at a jydh 86ba:mj57wfj 6pgiveq:mm* -+:9+ct(zbhmq5kxeudqe6ij* mb1 v b fn time. The frequency of the wave is 120 Hz. What is the*+5 69q fd u(txm1zveqbm- j:hb*cbkeim+mq : amplitude?
A. $0.05 \; m$
B. $0.10 \; m$
C. $0.15 \; m$
D. $0.20 \; m$