ABCD parallelogram\\
DB diagonal\\
$| \mathrm { AE } | = 3$ units\\
$| \mathrm { EB } | = 5$ units
The areas of the colored triangles in the figure are equal to each other.\\
Given that the area of this parallelogram is 30 square units, what is the area of triangle BCF in square units?\\
A) 8\\
B) 9\\
C) 10\\
D) 11\\
E) 12