Given the code fragment: 

Which code can be added to register both of these methods to receive BankEvent notifications only if an instance of BankActivityService is already instantiated in the current context? 

Answer options:

A. @Observes(notifyObserver=IF_EXISTS) on line 3 and line 6
B. @Observes(during=IN_PROGRESS) on line 1
C. @Observes(during=AFTER_COMPLETION) on line 1
D. @Observes(notifyObserver=IF_EXISTS) on line 4 and line 7 before method parameter declaration

A

Reference - https://docs.oracle.com/javaee/7/tutorial/cdi-adv005.html