Let \( f: R \rightarrow R \) be defined by \( f(x)=2 x+\sin x \) for \( x \in R \). Then \( f \)...

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Let \( f: R \rightarrow R \) be defined by \( f(x)=2 x+\sin x \) for \( x \in R \). Then \( f \) is :
(A) one to one and onto
(B) one to one but not onto
(C) onto but not one to one
(D) neither one to one nor onto
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