What Are Two Reasons That You Would Consider Implementing a POW

Multiple Choice

What are two reasons that you would consider implementing a POW algo in your blockchain? (Select two.)

A) PoW imposes no limits on actions in the network and therefore can thwart attacks better than other algos due to high cost
B) What matters is to have large computational power to solve the puzzles and form new blocks over having a financial stake.
C) PoW imposes some limits on actions in the network and therefore can thwart attacks better than other algos due to high cost
D) The algo is energy efficient compared to POS and BFT
E) The algo is energy efficient compared to POS and DPOS