Devon wants to identify the simple subject and predicate in the sentence, "Once upon a time, two children, a boy and a girl who were the son and daughter of a woodcutter, lived out their dreary days in a ramshackle cottage deep in the woods." What are some rules Devon should remember about simple subjects and predicates?

A$.$ Don't include prepositional phrases or proper names with a simple subject, and don't include verb phrases as part of a simple predicate.

B$.$ Don't include articles or adjectives with a simple subject, and don't include parts of speech except verbs with a simple predicate.

C$.$ Don't include "you" as part of a simple subject, and don't include commands as part of a simple predicate.

D$.$ Don't include articles or adjectives with a simple predicate, and don't include parts of speech except verbs with a simple subject.