If Fernande constructed a copy of ∠C AB and labeled it as ∠FDE, and she measures ∠FDE to be 59°, then the measure of the original angle ∠C AB is the same as the measure of ∠FDE because she made an exact copy of it.
Therefore, the measure of ∠C AB is 59°.
So the correct answer is: • The measure of ∠C AB is 59°.