Which of the following is a homogeneous linear differential equation with constant coefficients whose general solution is ( y = c1 cos(7x) + C₂ sin(7x) ?

A) ( y'' + 49y = 0 )

B) ( y'' - 49y = 0 )

C) ( y'' + 7y = 0 )

D) ( y'' - 7y = 0 )