In object$-$oriented languages, when polymorphism concerning $($non$-$static$)$ methods is implemented using function pointers, polymorphism is able to occur because of:

$($NOTE: Select all items that are correct and necessary to be present in your response.$)$

Question $2$Select one or more:

a$.$

Every type that inherits from another type, copies its parent$($s$)$ vtable data except for the slots associated with overridden methods $+$ no new slots are added for new methods.

b$.$

Every type that inherits from another type, nulls out its parent$($s$)$ vtable data except for the slots associated with overridden methods $+$ new slots are added for new methods.

c$.$

Object$-$oriented polymorphism cannot be implemented using function pointers at all.

d$.$

Every type $($and$/$or object of that type$)$ has a vtable pointer which points to only one array of function pointers where each non$-$static function is assigned a specific slot in that array.

e$.$

Every type that inherits from another type, copies its parent$($s$)$ vtable data except for the slots associated with overridden methods $+$ new slots are added for new methods.