How does Enginuity Consistency Assist (ECA) differ from PowerPath?

A.
ECA suspends I/O at the Symmetrix level, while PowerPath suspends I/O at the host level.

B.
ECA suspends I/O at the host level, while PowerPath suspends I/O at the Symmetrix level.

C.
ECA cannot suspend I/O for multiple hosts, but PowerPath can.

D.
ECA supports TimeFinder/Clone only, while PowerPath supports TimeFinder/Clone and TimeFinder/Snap.