Which tatement can be concluded uing the true tatement hown?

If two angle in a triangle meaure and x degree, then the third angle meaure (90 − x) degree. In triangle ABC, angle A meaure 90 degree and angle B meaure. Angle C mut meaure 50 degree. Angle C mut meaure 40 degree. Angle C mut meaure (90 − 40) degree. Angle C mut meaure (90 − 30) degree