The correct option is B but to ensure that the person making the suggestion receives recognition for his contribution
Here, a lack of parallelism eliminates options C, D and E: in C "ensuring" does not correspond with "receives"; in D " suggestion-maker" does not correspond with "contribution" and in E "suggestion-maker" and "recognition" does not work together. Between A and B, A has the correct tense in the second part of the sentence. So, option A is the answer.