[单选题]
Find the first three harmonics o-8 hugwi w)cmpp0*;:xxm gu9of a string of linear atgy.o rud4+ux 4 1qagl-xp8+mass density 2.00 g/m and length 0.600 m when it is subjected to tensio.a4gqt+ ulr agu dp41x +yo8x-n of 50.0 N.
A. 132 Hz, 264 Hz, 396 Hz
B. 66 Hz, 132 Hz, 198 Hz
C. 264 Hz, 528 Hz, 792 Hz
D. none of the above
