Which is the correct answer

Find f'(x) if f(x) = (cos x) . O A. x(In(cos x) - tan x) O B. In cos x) I Sin T COS C O C. In ( cos x) + I sin a COS C O D. (cos x)" (In(cos x) - r tan x) (cosa) " ( In (cosz) - In T Sin COS