Solve the Differential Equation $y ^ { tt } + y = 6 \sec x \text { by the method of variation of }$

Multiple Choice

Solve the differential equation $y ^ { tt } + y = 6 \sec x \text { by the method of variation of }$ parameters.

A) $y = \left( C _ { 1 } + 6 \cot x \right) \cos x + \left( C _ { 2 } + 6 x ^ { 2 } \right) \sin x$
B) $y = \left( C _ { 1 } + 6 \ln | \sin x | \right) \cos x + \left( C _ { 2 } + 6 x \right) \sin x$
C) $y = \left( C _ { 1 } + 6 \tan x \right) \cos x + \left( C _ { 2 } + 6 x \right) \sin x$
D) $y = \left( C _ { 1 } + 6 \ln | \cos x | \right) \cos x + \left( C _ { 2 } + 6 x \right) \sin x$
E) $y = \left( C _ { 1 } + 6 \ln | \cos x | \right) \cos x + \left( C _ { 2 } + 6 x ^ { 2 } \right) \sin x$