[单选题]
Find the first three harmonics of a string ozjd19,s.jl s:gi 8 kfff linear mass denre; jye6dm/6l/k doc4x* ysn6sity 2.00 g/m and ll 6d e *x os//r6y6jky4;edmcnength 0.600 m when it is subjected to tension 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
