Which describes how to construct a duplicate angle?
A.
Draw a starter ray; set the compass at length AB; place the compass at C; mark point D.

B.
Draw a starter ray; locate point C on starter line; draw an arc with center at A that intersects both sides of the angle; using same radius, draw an arc with center C; label points B, D, and E; draw an arc with radius BD at center E; label intersection F; draw ray CF.

C.
Draw a starter ray; duplicate the line segment on the ray; duplicate each angle using the two endpoints of the line segment as vertices of the angles; extend sides of angles.

D.
Draw a starter ray; locate point C on starter line; set the compass at length AB; draw an arc with center C all the way around.