Which piece of evidence shows Heathcliff's mindset of revenge above all else? A. "While he was speaking, Joseph returned, bearing a basin of milk-porridge, and placed it before Linton; who stirred round the homely mess with a look of aversion, and affirmed that he could not eat it." B. "Then the latch was raised and fell: they did not suffer him to come forth." C. "Yes, Nell," he added, when they had departed, "my son is prospective owner of your place, and I should not wish him to die till I was certain of being his successor." D. "No! What a shame of your mother, never to waken your filial regard for me!"
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C. "Yes, Nell," he added, when they had departed, "my son is prospective owner of your place, and I should not wish him to die till I was certain of being his successor."

Explanation:

In these lines, Heathcliff explains how he feels about his son. It is clear that he has no regard for him, and that his thoughts are mostly focused on revenge. He tells us that his son will inherit the place, and that he will ensure his son does not die until Heathcliff himself is secure as his successor. Therefore, he shows that he cares about power, in order to make those who have offended him regret their actions.