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?
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
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