Respuesta :

Okay, So We Know That EG = 21, And EF = 6. So, We Just Need To:

EG - EF.

So:
21 - 6
This Equals 15.
So, The Answer Is B.
You can find the value of FG by subtracting the value of EF from EG.

EG - EF = FG
   21 - 6 = FG
        15 = FG

The value of FG is B. 15