"positively" or "inevitably"???

Please look at the following question.

Mr.Lee's huge success as a business leader will ___ attract his admirers throughout the industry"
A)importantly B) exactly C) positively D) inevitably

Such question is very difficult for me. The correct answer is D)inevitably. I thought it should be "positively".
Could you tell me whether I can use "positively" in the context?
"positively" is also okay, but do I have to choose the best answer?
I hope someone explain to me the reason why it is D)inevitably.
Thank you for your answer in advance.