[单选题]
A stretched string is observed to have four 5hsgcpobb a)78 6 7gpbequal segment3qa3y)/slnb/ufm sf8 s in a standing wave driven at a frequency of 480 Hz. What driving frequency will set up a standing wave with fivf8asy)qnlm3/f /bs3u e equal segments?
A. $600 \; Hz$
B. $360 \; Hz$
C. $240 \; Hz$
D. $120 \; Hz$