Which image shows a plane slicing a cone to produce an ellipse?
A
[Image: 2 cones are stacked at their points. A horizontal ...]
B
[Image: 2 cones are stacked at their points. A plane goes ...]
C
[Image: 2 cones are stacked at their points. A plane goes ...]
D
[Image: 2 cones are stacked at their points. A plane goes ...]