Misunderstandings from lack of social communication, unless with properly, may lead to

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A. resulted; dealt
(答案→)B. resulting; dealt
C. resulted; dealing
D. resulting; dealing
解析：考查非谓语动词。Misunderstandings和result from是主谓关系，用现在分词作定语，相当于which result from...，排除A、C；unless后省略了misunderstandings，misunderstandings与deal with是动宾关系，用过去分词表被动，相当于unless they are dealt with...，排除D。故选B。