According to Kepler, what do all bodies in orbit around another have in common?


A.

All follow a circular path around a central body, which is the focal point of the circle.


B.

All follow a path tangent to a circle around a central body or focal point.


C.

All follow a spherical path that has a focus on each of two equidistant axes.


D.

All follow an elliptical path that has two foci, rather than a circular path.