What are two reasons to implement IPv4 private addressing on a network? (Choose two.)

What are two reasons to implement IPv4 private addressing on a network? (Choose two.)

A. To enable internal applications to treat the private IPv4 addresses as unique B. To facilitate renumbering when merging networks C. To expand the routing table on the router D. To provide protection from external denial-of-service attacks E. To conserve global unique IPv4 addresses