A class inherits a base class and it overrides a method from that base class.

Select all possible forms of the base class and its method:

$($Select all acceptable answers$)$

The method in the overriding class must have the override.

The method from the base class does not need to have any modifier.

The method from the base class can have only a protected modifier.

The method from the base class can be virtual in $CA$

The method from the base class can be abstract in $CH$

The base class can be sealed in $CH$

The base class can be abstract in $CH$