Like lambs to a slaughter suggests that the slugs (much like the sheep) have no idea that death comes soon, for the slugs either the birds will get them, they get dried out(?), or they risk being found by a human. For the sheep, they’re happy because they have an unlimited supply of food and they’re happy, but they’re being led to their deaths.
Then she tells him her plan: while Duncan sleeps, she will give his chamberlains wine to make them drunk, and then she and Macbeth can slip in and murder Duncan. They will smear the blood of Duncan on the sleeping chamberlains to cast the guilt upon them.
Well for one I think their immaturity didn't help the situation. Their love was a lot like puppy love in the sense that it was their first time dealing with a relationship and therefore didn't know how to handle issues that were thrown at them. At the same time, some of the other characters may disagree because "young love is the best love" in the sense that it is pure and innocent.
Being in a pickle means to be stuck in a difficult situation so the answer should be D