Which use of water has grown most dramatically since 1900

Ido believe it is b 

Ithink the answer  is d. tourism.hope this ☺☺

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.