Which sentence distracts the reader from the main idea and should be removed from the paragraph?

What is the earth matial ot igneous rock

If we represent the solar system on a scale that allows us to walk from the sun to pluto in a few minutes, then a) the planets are microscopic and the stars are millions of miles away. b) the planets are the size of basketballs and the nearest stars are a few miles away. c) the planets are marble size or smaller and the nearest stars are thousands of miles away.

The european union was formally established in