The following argument involves acknowledging and refuting other viewpoints. Which part is the author’s refutation? Choose an appropriate answer.The probing of outer space has proved, and will still prove, crucial to us. As for the money spent on space programs, it is indeed enormous. But if we could stop all the wars on earth, there would be much more money than we could afford for the present and future space programs. All in all, the probing of outer space is one of the greatest missions man has ever set himself.