Answer:
An either-or fallacy.
Step-by-step explanation:
This fallacy occurs when, in this case, the speaker builds an argument under the assumption that there are not more than 2 outcomes or choices for that specific dilemma. In this case, Wesley's persuasive speech about school violence and gun control has "only" two outcomes: either they forbid guns from everyone except police and military or they can expect massacres in schools.