Final answer:
Juliet is shocked and conflicted when the nurse tells her that Romeo was banished and Tybalt was killed by Romeo because it presents a major obstacle to their love and puts them in a dangerous situation.
Step-by-step explanation:
Juliet is shocked and conflicted when the nurse tells her that Romeo was banished and Tybalt was killed by Romeo because it presents a major obstacle to their love and puts them in a dangerous situation. Juliet is shocked because she realizes that her marriage to Romeo has caused harm and destruction within her family. She is conflicted because she loves both Romeo and her family, and she is torn between her loyalty to them.