Which passage shows Juliet's uncertainty about the lasting power

of Romeo's emotion?

A. But that thou overheard'st, ere I was ware,

My true love's passion: therefore pardon me,

And not impute this yielding to light love ...

B. Three words, dear Romeo, and good night indeed.

If that they bent of love be honourable,

Thy purpose marriage, send me word to-morrow.

C. O, swear not by the moon, the inconstant moon,

That monthly changes in her circled orb,

Lest that thy love prove likewise variable.

D. Yet I should kill thee with much cherishing.

Good night, good night! parting is such

sweet sorrow.

So here's my "translation" of each of the passages:

A. I'm really in love you, Romeo, and I really am telling the truth!

B. I'm so in love with you I forgot how to count, and I think three is four. Regardless, if you really do love me, tell me tomorrow and we can get married then.

C. Unless you're about to change your mind about loving me, don't say that you love me like something that changes, because that means that your love for me will change.

D. Darn, I really love you, so much that I'm murderous towards you, and I can barely handle being away from you.

Okay, those were more for comic relief, but they were very, very loose translations of those snippets of texts. So, with them, we can clearly see that C is the right answer.