Answer:
Option E
Step-by-step explanation:
In simple words, one cannot directly reject the idea from a potential business partner as it can harden the relations for future also the other employee has a higher position in regard.
Thus, one has to make sure tat their way of talking remains respectable and at the same time they get their work done. Therefore, option E is the best one as the expression states that the manager agrees with the idea and appreciates the offer but wants to be open for other ideas also.