Which statement is true about the Timer service in an EJB 3.0 stateless session bean?

Which statement is true about the Timer service in an EJB 3.0 stateless session bean?

A.
The timeout callback method contains the business logic that handles the timeout event.

B.
The timeout callback method must be declared as a business method in business interfaces.

C.
The timeout callback method can throw application exceptions to report business logic failures.

D.
A bean class can implement multiple timeout callback methods, each associated with a
different timer.