A box has 5 white and 2 red balls. Another box has 3 white and 4 red balls. One ball is randomly seleckd from the first box and it is transferred to second box. Then one ball is randomly drawn from the second box. The probability that it is red is

A

$$\frac{15}{28}$$

B

$$\frac{9}{16}$$

C

$$\frac{5}{14}$$

D

$$\frac{5}{28}$$