A container is filled with liquid, 6 part of which are water and 10 part milk. How much of the mixture must be drawn off and replaced with water, so that the mixture may be half water and half milk?

A

$$\frac{1}{3}$$

B

$$\frac{1}{7}$$

C

$$\frac{1}{5}$$

D

$$\frac{1}{8}$$