[单选题]
A stretched string is observed to have four equal s6o+jrc53nsmh .i dbv7 egments in a )1tdrj /b.te upt(x7sstanding wave driven at a frb)/ud st7rx j1 tpt.(eequency of 480 Hz. What driving frequency will set up a standing wave with five equal segments?
A. $600 \; Hz$
B. $360 \; Hz$
C. $240 \; Hz$
D. $120 \; Hz$