Answer:
A. A triangle can have two congruent angles.
Explanation:
By congruent we means equal angles. A triangle has three angles. So the B option is invalid .
Also
A triangle can have two congruent angle and such triangles are called isosceles triangles
A triangle can have all three angles congruent also and such triangles are called Equilateral Triangles
Also there is possibility that no two angles are congruent in the triangle , such triangles are called scalene triangles.