What factors determine the frequency of a note emitted by a vibrating string?

A. Amplitude of vibration, force constant of string and length of string
B. Amplitude of vibration, force constant of string, and tension in the string
C. Mass per unit length of string, tension in string and length of the string
D. Force constant of string, tension in the string, and length of the string.

Correct Answer:

Option A = Amplitude of vibration, force constant of string and length of string