The term 'anticipation' describes an expectation for something yet unseen. The mood of anticipation is fueled when the Nurse agrees to help Romeo and Juliet marry. The reader in this case is expectant and wishes to see how this will play out. Considering the feud between the families of Romeo and Julio which also involved their servants, the reader might wonder as to how the Nurse will successfully execute her plan.
I'm not sure if that's what you meant to spell the last answer choice as or not but the rest of them aren't synonyms for hospitals so I'm going to assume you meant infirmary
