Which three statements are true regarding event handling in the Salesforce B2B Commerce managed package? (3 answers)

Which three statements are true regarding event handling in the Salesforce B2B Commerce managed package? (3 answers)
A . Salesforce B2B Commerce relies on a series of Javascript click listener events.
B . Writing directly to your own custom Backbone JS Views and Models automatically
integrates that data into the Salesforce B2B Commerce Backbone Views and Models.
C . Salesforce B2B Commerce relies on a central event channel for communication across various Salesforce B2B Commerce Backbone Views and Models called CCR
D . pubSub.
E . CCR
F . pubSub defines the following three functions which can be used for event handling: trigger, on, and once.
G . CCR
H . pubSub extends the Backbone.Events JavaScript object.

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Answer: C,D,E