Noah is baking a two-layer cake, in which the bottom layer is a circle and the top layer is a triangle. segment AB = 10 inches and arc AB≅ arc AC, what does Noah know about the top layer of his cake?

A. Segment AB is twice the length of segment AC because their arcs are congruent;
therefore, ΔABC is an equilateral triangle.
B. Segment AB ≅ segment AC because their arcs are congruent; therefore, ΔABC is
an isosceles triangle.
C. Segment AB is twice the length of segment AC because their arcs are congruent;
therefore, ΔABC is an isosceles triangle.
D. Segment AB ≅ segment AC because their arcs are congruent; therefore, ΔABC is
an equilateral triangle.