Which of the following tools would be most useful for comparing data about the spread of a disease and the locations of at risk populations?

The answer would be a.

Dif i’m not mistaken

Hello i am going to be you today with your problems today. i believe that the answer is going to be. i hope this you have a great day.a. people around the world 

The circumcenter is  equidistant  from each vertex of the triangle. the circumcenter is at the  intersection  of the  perpendicular bisectors  of the triangle's sides. the circumcenter of a right triangle falls on the side opposite the right  angle. the incenter  of a triangle is always inside it.