Topic: Smalltalk. True or false?

If false, then explain why not (Code example would be helpful).

(a) Smalltalk is implemented from a hybrid implementation system.

(b) Smalltalk data types fall into two categories: primitive types and reference types.

(c) Variable types must be declared in Smalltalk.

(d) Smalltalk depends on garbage collection to reclaim memory occupied by no longer used objects.

(e) Smalltalk classes are built upon a single class hierarchy.

(f) Smalltalk do not support multiple inheritance. It only supports single inheritance.