Answer:
A. the wave speed v and Wavelength
Explanation:
Given that
Mass density per unit length=μ
Frequency = f
The velocity V given as
[tex]\mu=\dfrac{T}{V^2}\ kg/m[/tex]
[tex]V=\sqrt{\dfrac{T}{\mu}}[/tex]
T=Tension
V=Velocity
V= f λ
λ=Wavelength
Therefore to find the tension ,only wavelength and speed is required.
The answer is A.