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【答案】D. resist

【解析】动词辨析。Unhealthy curiosity is possible to ___, however. 这句话之后出现了论据，用以支撑前文的论点：In a final experiment, participants who were encouraged to ___how they would feel after viewing an unpleasant picture were less likely to ___ to see such an image. 在最后的实验中，那些预测自己目睹不太愉悦的图片感受的受试者选择此类图片的可能性较小。此处picture were less likely to ___ to see such an image对应resist，是对于本段论点句的同义复现，因此选择D 选项resist。A选项trace，追踪；B 选项define，定义；C选项replace，替代，皆不符合文意。