The following sentences are the steps involved in proving the result \( \frac{\cos x}{1-\tan x}+...

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The following sentences are the steps involved in proving the result \( \frac{\cos x}{1-\tan x}+\frac{\sin x}{1-\cot x}=\cos x+\sin x \). Arrange them in sequential order from first to last.
(A) \( \frac{\cos ^{2} x}{\cos x-\sin x}+\frac{\sin ^{2} x}{\sin x-\cos x} \)
(B) \( \frac{\cos ^{2} x-\sin ^{2} x}{\cos x-\sin x} \)
(C) \( \frac{\cos x}{1-\frac{\sin x}{\cos x}}+\frac{\sin x}{1-\frac{\cos x}{\sin x}} \)
(a) (A), (B) and (C)
(b) (C), (A) and (B)
(c) (C), (B) and (A)
(d) None of these
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