Explanation

The reputable key marks (b), "to do something because you are angry". Strictly, the standard idiom "to cut one's own throat" means to act against one's own interests (self-sabotage) — a sense none of the options offers, so this item's key is disputed. Among the options, the key treats the self-harming act as one done in anger, on the analogy of "cutting off one's nose to spite one's face". Key disputed. Hence (B).