Answer:
B) You yourself are responsible for doing your own laundry.
Step-by-step explanation:
Pronouns are words used instead of nouns and noun phrases.
An intensive pronoun is a pronoun we use to place emphasis on its antecedent (the word it refers to). Pronouns that belong to the category of intensive pronouns are: myself, yourself, himself, herself, itself, ourselves, yourselves, and themselves.
The only option that contains this type of pronoun is option B. We could omit it and say You are responsible for doing your own laundry. This proves that the purpose of the pronoun yourself is to add emphasis to the word you.