Which of the Following Statements Is FALSE

Which of the following statements is FALSE?

A) Approximately 65 million years ago, a 10-km wide asteroid struck Earth and wiped out more than 50 percent of all living species.
B) The Moon probably was formed by a collision between a Mars-sized body and the Earth.
C) During summer in the northern hemisphere of Mars, the polar ice cap melts and liquid water flows outward from it in rivers.
D) The surface of Venus is relatively young with an estimated age of less than 1 billion years.
E) Mercury has many fractures and faults on its surface that probably arose when it cooled very rapidly and shrank.