Really need !

the figure shows triangle abc with medians a f, bd, and ce. segment a f is extended to h in such a way that segment gh is congruent to segment ag. (goes with picture)

which conclusion can be made based on the given conditions?

a. segment eg is congruent to segment gd.
b. segment gf is half the length of segment eb.
c. segment bg is congruent to segment gc.
d. segment eg is half the length of segment bh