Which three statements are true about a job chain?

Which three statements are true about a job chain?

A.
It can contain a nested chain of jobs.

B.
It can be used to implement dependency-based scheduling.

C.
It cannot invoke the same program or nested chain in multiple steps in the chain.

D.
It cannot have more than one dependency.

E.
It can be executed using event-based or time-based schedules.

Explanation:
http://docs.oracle.com/cd/B28359_01/server.111/b28310/scheduse009.htm#ADMIN12459