If circular arcs A C and B C have centers at B and A, respectively, then there exists a circle tangent to both \overparen{A C} and \overparen{B C}, and to \overline{A B}. If the length of \overparen{B C} is 12 , then the circumference of the circle is
Answer Choices
A. 24
B. 25
C. 26
D. 27
E. 28
