If $$\sigma$$ is the standard deviation of $$x_1, x_2, x_3, ......, x_n$$ then the standard deviation of observations $$5x_1 - 11, 5x_2 - 11, 5x_3 - 11, ....., 5x_n - 11$$ is

A

$$5(\sigma - 11)$$

B

$$5\sigma - 11$$

C

$$5 \sigma$$

D

$$\sigma$$