单选题 We learn from the passage that an emotion is created by something that ______.

【正确答案】 A
【答案解析】[解析] 事实了解题，本题答案可从第一句话中an emotion is aroused when a man or an animal views something as either bad or good得出，人的情绪是由对好坏的判断产生的，因此，答案为A。