What can a PPM deployment be? (Select two.)

A.
a load-balancing architecture of two servers, one with a web server and an
application server and one with only an application server
B.
a high-availability architecture with four servers: two web servers and two
application servers
C.
a two-machine architecture with one web server and one application server
D.
a single-machine architecture with one web server and one application server
E.
a load-balancing architecture of two servers, each with a web server and an
application server