The used rhetorical device is Hyperbole.
Saying that something is a billion times better is hyperbole because it is not really that much better, you would just be over exaggerating.
Answer:
A) It means the opposite of ignorance
Explanation:
This is because boldness and cautiousness are opposing words so sagacity and ignorance are also opposing words.
Juliet is greeted with a kiss from Paris, which she isn't pleased about, and whips out the dagger and threatens to kill herself as soon as he leaves.
I believe The answer is A