Two Marbles Are Drawn Without Replacement from a Box with 3

Multiple Choice

Two marbles are drawn without replacement from a box with 3 white, 2 green, 2 red, and 1 blue marble. Find the probability.
-The second marble is blue given the first marble is white.

A) $\frac { 1 } { 7 }$
B) $\frac { 1 } { 8 }$
C) $\frac { 3 } { 8 }$
D) $\frac { 3 } { 7 }$