Which of the following are the features of Zend_Controller_Front? Each correct answer represents
a complete solution. Choose all that apply.

A.
By default, the ErrorHandler plugin and ViewRenderer action helper plugin are loaded
inZend_Controller_Front.

B.
It is used to register a plugin broker, which allows calling a user code when certainevents
occurin controller process.

C.
It is used to implement the Singleton pattern.

D.
It is used to handle the request and output.