In Act 2, scene 3 from "Romeo and Juliet," by William Shakespeare, Friar Lawrence's soliloquy makes reference to the healing effectiveness of herbs and medicinal plants, at the same time they can be poisonous. As a consequence, he suggests that good qualities in nature and in people can lead to destruction if not used in the exact manner. Thus, he foreshadows the tragic death of the lovers.
Doubling, or C is the correct response.