10. A traveling wave on a string of linear density μ can be described by the wave function y(x, t) = A sin (Bx+ Ct+ D) where A, B, C, D are all positive constants. Which statement is not correct?.
(A) wavelength (λ) =2 π /C；
(B) velocity of the wave (U) = CIB ；
(C) tension
(F) = μC2/B2,
(D) All；
(E) None.