Pam draws three scalene triangles. In each figure, she measures each angle, as shown. Which conjecture is reasonable for Pam to make?

a. In a scalene triangle, none of the angles are congruent.
b. In a scalene triangle, none of the angles are right angles.
c. In a scalene triangle, one of the angles is obtuse.
d. In a scalene triangle, all of the angles are acute.