Standard Deviation of n observations \(a_{1}, a_{2}, a_{3} \ldots . a_{n}\) is \(\sigma\). Then the standard deviation of the observations \(\lambda a_{1}, \lambda a_{2}, \ldots \lambda a_{n}\) is
(A) \(\lambda \sigma\)
(B) \(-\lambda \sigma\)
(C) \(|\lambda| \sigma\)
(D) \(\lambda^{n} \sigma\)