Which pair of characters have a relationship based on caregiving? a. nurse and juliet b. romeo and juliet c. mercutio and tybalt d. nurse and capulet

It's either A or D, sorry if I'm wrong

The answer is the Nurse and Juliet. Their entire relationship is built off of care-giving. The nurse acts as if she is Juliet's second mother, and she is even seen worrying and caring for her in the way a mother would. She is somewhat of a modern day nanny, and these are people that specialize in care-giving. 

The reason the others are incorrect: Romeo and Juliet have a relationship built off of love at first sight, lust, and romantic affection. This is not what a care-giver is in the slightest. Mercutio and Tybalt are on opposing sides and Tybalt even ends up killing Mercutio. This is not the sign of a care-giver, someone who should be there for the other every day and acting as if the role of a mother. Now, although Nurse and Capulet seems close, it is incorrect. The nurse and Capulet barely interact, and when they do it is centered around the well-being of Juliet. The nurse does not act like a mother to Capulet the way she acts towards Juliet. This is why the correct answer is A.