On what does Juliet blame the nurse's tardiness?

her tendency to babble

her age

her lack of focus

her laziness

Her age or lack of focus I believe, good luck

Her age

Explanation:

After the nurse shows up two and a half hours late, Juliet is tired of waiting for her. Juliet accuses the nurse of being old and passionless, and of using the excuse of her age in order to avoid doing things properly. In reality, the nurse was two hours late because she had to get Romeo's ladder. Moreover, we learn that the nurse was also not feeling well.