The set of points in space that are a given distance from a given point is called an <u>Edge.</u>
D would be incorrect since it doesn’t have any edges and is like a circle but is 3D. A cylinder is also incorrect since it has curves from top to bottom. C is also incorrect since it only shows one side, which is called the face. That leaves you with edge which would be the correct answer.
For A: 1 senior; 1 infant; 2 children; 4 adults, out of 8 people for B: 1 senior; 3 infants; 6 children; 6 adults, out of 16 people for D: $43.75 for E: $76.25
