Which of the Following Statements About the Cambrian Is True

Multiple Choice

Which of the following statements about the Cambrian is true?

A) The Burgess Shale is a Cambrian fossil bed.
B) The first multicellular life occurred during the Cambrian.
C) The Cambrian marks the end of the Paleozoic era.
D) Oxygen concentrations were low during the Cambrian.
E) None of the above