Argument Evaluation (Strengthen): Consider the claim: “Employees who use the gymnasium facilities are fit.” Which of the following statements, if true, most strengthens the claim?

Introduction / Context:
We must strengthen the claim “Employees who use the gymnasium facilities are fit.” Strengthening statements should most directly assert or provide strong evidence for the claim as stated.

Given Data / Assumptions:

• The target statement is a general claim about gym users being fit.
• We assume “fit” is a property measurable across employees.

Concept / Approach:
In logical strengthening, a statement that mirrors the claim with high generality is strongest; statements that reverse direction, restrict scope, or use “some” are weaker.

Step-by-Step Solution:
Option B restates the claim directly: all employees who use the gym are fit—this maximally supports the original claim.Option A adds “only,” which is stronger than necessary and introduces a different biconditional idea (excludes non-gym users from being fit). Not required to strengthen the one-way claim.Option C reverses direction (fit → gym use), which does not support the original direction.Option D uses “some,” which is too weak to strengthen a general claim.

Verification / Alternative check:
Direct restatement of the universal conditional is the strongest support.

Why Other Options Are Wrong:
A changes meaning; C reverses; D is insufficiently strong.

Common Pitfalls:
Confusing “only if” with “if,” or mistaking a subset claim for a universal.

Final Answer:
The employees who use gymnasium facilities are fit