The Wavelengths Corresponding to the Harmonics of a String with Fixed

Multiple Choice

The wavelengths corresponding to the harmonics of a string with fixed ends can be found by saying that the length of the string must be equal to

A) an odd number of quarter-wavelengths.
B) an odd number of third-wavelengths.
C) an odd number of half-wavelengths.
D) an integer number of half-wavelengths.
E) an integer number of wavelengths.