The correct option is C initial phase constant
We know that,
Velocity of a sinusoidal transverse wave is,
v=ωk
Where
ω=2πT=2πf and k=2πλ
∴v=ωk=λT=2πfk
⇒ Speed of a sinusoidal transverse wave depend upon time period, frequency and wavelength.
It does not depend on initial phase constant (ϕ).