What is the answer to this question?

Given: circle o, cd is diameter, chord ab || cd. arc ab = 74°, find arc ca.

Ineed on this question me get the answer

Does the construction demonstrate how to copy an angle correctly using technology a) yes the distance between points a and f was used to create circle h b) yes the distance between points f and g was used to create circle h c) no the distance between points a and f was used to create circle h d) no the distance between points f and g was used to create circle h