In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of thefour alternatives._x005F_x000D_ One who has witnessed a debate ______ argument between two men _____________ strong intellectually, one of whom is a trained logician and the other lacking this advantage, will never forget the impression produced _________ him by the unequal struggle. The conflict is like that of a ____________ wrestler, untrained in the little tricks and turns of the science, in the various principles of applying force in a certain way at a certain time, at a certain place, with a __________ and experienced wrestler._x005F_x000D_ witnessed a debate ______ argument between_x005F_x000D_

• A. of
• B. or
• C. but
• D. so