What does "strengthening an argument" involve?

Strengthening an argument involves offering additional evidence that supports the conclusion, which is precisely what the correct answer indicates. This additional evidence can enhance the validity of the argument by making the conclusion more compelling and justified. By providing more support, the argument becomes less vulnerable to counterarguments and increases the overall strength of the reasoning.

In the context of logical reasoning, an argument is typically assessed by its premises and conclusion. When you introduce supplementary information that aligns with the conclusion, it bolsters the argument’s foundation and makes it more persuasive. Strong arguments are those that can withstand scrutiny, and additional supportive evidence is a key element in achieving that strength.