Earth Is Estimated to Be Approximately 4

Multiple Choice

Earth is estimated to be approximately 4.6 billion years old. Life appeared early in the history of Earth, but metazoans multicelled organisms did not appear until about 600 million years ago. If the history of Earth were compressed into a single year, about when would metazoans appear?

A) late January
B) mid- December
C) late September
D) late November