Which of the Following Statements Is One of Kepler's Three

Multiple Choice

Which of the following statements is one of Kepler's three laws of planetary motion?

A) A line joining any planet to the sun sweeps out equal areas in equal times.
B) Only an odd number of planets can orbit the sun.
C) The period of any planet about the sun is proportional to the planet's distance from the sun.
D) All planets move in elliptical orbits with Earth at one focus.
E) F = GMm/R²