Which of the Following Statements About Comets Is NOT True

Multiple Choice

Which of the following statements about comets is NOT true?

A) Comets are thought to have the consistency of snowballs.
B) The birthplace of comets is a cloud of icy, dusty aggregates at the edge of the solar system.
C) Most comets have elliptical orbits with periods around one hundred years.
D) The tail of a comet consists of dust and evaporated ices.