单选题 They are both very determined people, so there' s rather a ______ of personalities.
A. debate B. disagreement C. contest D. clash

【正确答案】 D
【答案解析】clash冲突。句意为：他们俩的意志很坚定，因此有很大的冲突。debate辩论； disagreement不一致；contest竞赛。