Which of the Following Processes Require(s) Chemical Methods

Multiple Choice

Which of the following processes require(s) chemical methods?

A) Separating a homogeneous mixture into pure substances.
B) Separating a heterogeneous mixture into pure substances.
C) Distilling a saltwater mixture.
D) Breaking a compound into its constituent elements.
E) At least two of the above (a-d) require chemical methods.