What is the difference between the default configuration for zones and an immutable zone?

What is the difference between the default configuration for zones and an immutable zone?

A.
Immutable zonescannot have users.

B.
Immutable zones cannotbe modified from within the zone.

C.
Immutable zones cannot run DTrace.

D.
A processinanimmutable zone can see processes in other zones.

Explanation:
Note:
*Immutable Zones provide read-only file system profiles for solaris non-global zones.
*A zone with a read-only zone root is called an Immutable Zone. A solaris Immutable Zone
preserves the zone’s configuration by implementing read-only root file systems for non-global
zones. This zone extends the zones secure runtime boundary by adding additional restrictions to
the runtime environment. Unless performed as specific maintenance operations, modifications to
system binaries or system configurations are blocked.
Reference:Oracle Solaris 11 Information Library,Read-Only Zone Overview