What story are you referring to?
I think D., because precautionary means to caution beforehand, in this case they are cautioning them before they make the choice the main character made. Hope that helped :D
The appropriate response is a persuasive influence. Influence is having a dream of the ideal result for a circumstance or association and after that, without utilizing power or compulsion, persuading individuals to cooperate toward making the vision a reality. Influence can be utilized to goad somebody to act or to settle on a choice without really winning their earnest purchase in.