Answer:
CF
Step-by-step explanation:
we know that
An angle bisector is a line that divide an angle into two equal angles.
In this problem
[tex]m\angle ACF=m\angle FCD[/tex] ---> given problem
[tex]m\angle ACD=m\angle ACF+m\angle FCD[/tex] ---> by addition angle postulate
so
CF is an angle bisector of angle [tex]m\angle ACD[/tex]
