The last option. There needs to be an apostrophe in "its".
During the Elizabethan Era, the social class was divided into six classes as they believe that this is the basis of skills, fame, birth and wealth. During this era, the reactions of the servants' and the musicians' to the death of Juliet would show us that social class, unlike those in the upper classes, those in the lower classes display more maturity spiritually in dealing with death.
