ABC is a triangle
$$\begin{aligned}& | \mathrm { AD } | = | \mathrm { CD } | = | \mathrm { BC } | \\& \mathrm { m } ( \widehat { \mathrm { BAD } } ) = 20 ^ { \circ } \\& \mathrm { m } ( \widehat { \mathrm { BCD } } ) = 60 ^ { \circ } \\& \mathrm { m } ( \widehat { \mathrm { ACD } } ) = \mathrm { x }\end{aligned}$$
Accordingly, what is x in degrees?\
A) 5\
B) 10\
C) 15\
D) 20\
E) 25