A. Sheila ate her lunch in the cafeteria.
Answer: The last sentence.
Explanation: in the last sentence the pronoun is placed where it clearly states whom they are speaking of. The second sentence could also be an answer but since it is misspelled I advise to just select the last sentence.
Answer: False
Explanation:
They introduce Adjective clauses.
However adverb conjunctions introduce adverb clauses.