Recent studies have discovered that fathers uniquely contribute to the development of thei

问题补充：

Recent studies have discovered that fathers uniquely contribute to the development of

their children, in low income families.

A. specially

B. definitely

C. specifically

D. particularly

答案：

A. specially

B. definitely

C. specifically

(答案→)D. particularly

解析：考查副词辨析。specially特别地，专门地，强调目的性；definitely明确地，确切地，一定地；specifically特有地，特定地；具体地；particularly特别，尤其。句意为：最近的研究发现，父亲对孩子的成长有独特的作用。对于低收入家庭来说，尤其如此。particularly与especially的用法相似，可用作插入语，对后面陈述的内容进行强调。