Answer:
b. They are vivid and unpleasant.
Explanation:
In this scene, we see the witches gathered around the cauldron. We also learn that the witches are preparing something extremely unappealing. Some of the objects and images they mention are the poisoned entrails of a toad, a swamp snake, a newt's eye, a frog's tongue, fur from a bat, a dog's tongue, the tongue of an adder, the stinger of a burrowing worm, a lizard's leg, an owl's wing, the scale of a dragon, a wolf’s tooth, a witch’s mummified flesh, a goat’s bile and baboon blood. All of these details are extremely vivid and unpleasant, and contribute to the development of a negative feeling in the mind of the reader.