单选题 We become susceptible to the moods and feelings, the behavior and treatment of our spouse,
A. responsible B. suspicious
C. committed D. vulnerable

【正确答案】 D

【答案解析】responsible：负责的；suspicious：多疑的；committed：过失的；vulnerable：易受影响的。题中susceptible意为“易受动摇的”，可知D选项符合要求。