C-06-Q182mediumsingle_mcqIf ∠C\angle C∠C and ∠D\angle D∠D are supplementary and ∠C−∠D=60°\angle C - \angle D = 60°∠C−∠D=60°, then ∠C=\angle C =∠C=a100°100°100°b110°110°110°c120°120°120°d