The Cause of the Meteor Showers Seen at Regular Times

The cause of the meteor showers seen at regular times each year on Earth is MOST likely

A) Earth running into material within the spiral arm structure of the Milky Way.
B) unstable weather conditions on Earth.
C) Earth moving through the remnant dust and rock fragments of an old comet that are orbiting the Sun in the comet's old orbit.
D) sunspot activity and the resultant geomagnetic disturbances.