Answer: B. at the center of the inscribed circle of the park.
Explanation:
We know that circumcenter as the point that is equidistant from all three of the vertices of a triangle.
The circumcenter is the center of the circle which goes through the three vertices of the triangle.
Since all radii of a circle are congruent. Therefore, the circumcenter is equidistant from the vertices of the triangle.
Hence, B is the right answer . The council should place the fountain at the center of the inscribed circle of the park such that fountain will be equidistant from all three sides of the park.