The correct answer is A) he suggests that because so many other countries are on the Soviet side, it is the right side.
Stalin used the bandwagon argument in his speech because "he suggests that because so many other countries are on the Soviet side, it is the right side.
The Bandwagon is a fallacy because it is based on a false assumption. The Bandwagon argument considers that the opinion of the majority is valid in all cases. It says something like "because everybody thinks something is correct, you should believe it too." So if everybody thinks this way, you should think this way. That is why it is a fallacy.
The other options of the question were B) he fails to define his terms before making his argument, so his language is too imprecise to understand. C) he restated his opponent's arguments a weakened form and then refutes those false arguments. D) he insults his opponents calling them "cannibals" and "panic-mongers," but ignoring their ideas.
