If D, E and F are the midpoints of AB, CD and AE respectively, and the area of triangle ABC is 24, then the area of triangle DEF is equal to
 
A3 
B 6
C 8 
D 12
If D, E and F are the midpoints of AB, CD and AE respectively, and the area of triangle ABC is 24, then the area of triangle DEF is equal to
 
A3 
B 6
C 8 
D 12