let an input x(t) = 2 sin(10πt) 5 cos(15πt) 7 sin(42πt) 4 cos(45πt) is passed through an lti system having an impulse response, the output of the system is

h(t) = 2 (sin(10πt)/πt) cos(40πt)

the output of the system is

A. 2 sin(10πt) + 5 cos(15πt)
B. 5 cos(10πt) + 7 sin(15πt)
C. 7 sin(42πt) + 4 cos(45πt)
D. 2 sin(10πt) + 4 cos(45πt)