If Everything in the Solar System Is Moving Around, Why

Multiple Choice

If everything in the solar system is moving around, why do the Perseid meteors repeat regularly around August 11th or so?

A) Because the Earth does not move relative to the meteor particles
B) Because the Earth in its orbit intersects the same swarm of meteor particles at the same time each year
C) Because the Perseids are not in space at all, but in the upper layers of the Earth's atmosphere
D) Because August 11th is when the Sun's rays are the warmest, and thus tend to move the meteor particles toward us at the fastest speed
E) Only astrologers can explain this regularity; astronomers do not understand it