Which Statement, or Statements, Are True About Depreciation

Which statement, or statements, are true about depreciation?

A) Depreciation is a non-cash expense that provides tax shield benefits.
B) The greater the depreciation expenses in earlier years, the higher the present value of the project.
C) For tax purposes, the MACRS depreciation schedules supersede the old methods of sum-of-the-years' digits, double declining balance, and so on.
D) All of these are true.