Select the correct answer. A planet is orbiting a nearby star. Suppose that the star's gravity increases over time. What effect will this increase most likely have on the planet's path of motion? A$.$ The planet will continue to move in an elliptical orbit around the star. B$.$ The planet will begin to orbit the star at a constant speed. C$.$ The shape of the planet's orbit will change from elliptical to circular. D$.$ The planet's orbital path will become smaller and its orbital period will increase. E$.$ The planet will begin to orbit the star in the opposite direction.