Answer:
The answer is indeed letter A) The cat, which is a Calico, sits in the window all day.
Explanation:
An appositive is a noun or noun phrase that is placed beside another noun or noun phrase with the intention of renaming it. In other words, the appositive gives further information about the noun or phrase it changes. Appositives are usually set off by commas, unless they are restrictive.
A relative pronoun is a word that substitutes a noun and introduces a relative clause - a relative clause has the purpose of modifying a noun. The most common relative pronouns are which, who, that, and whom.
The option that has both, an appositive and a relative pronoun, is letter A. The relative pronoun "which" is substituting the noun "cat". The clause "which is a Calico" is renaming the noun "cat".
