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Question 82·200 Super-Hard SAT Reading Questions·Expression of Ideas

While researching a topic, a student has taken the following notes:

  • A national loan-guarantee program reimbursed participating banks for some losses on new loans to firms with fewer than 50 employees.
  • Researchers compared firms with 45–49 employees, which qualified for the guarantee, with firms having 50–54 employees, which did not qualify but were similar in size.
  • Before the program began, the two groups received nearly identical average interest rates at both participating and nonparticipating banks.
  • During the study period, an economy-wide benchmark interest rate fell by 0.5 percentage points.
  • At participating banks, qualifying firms’ interest rates subsequently fell by 0.7 percentage points relative to rates for just-ineligible firms.
  • At nonparticipating banks, the interest-rate gap between the two groups remained essentially unchanged.

The student wants to explain how the study’s comparisons support the conclusion that the loan guarantee—not merely the economy-wide decrease in benchmark rates—lowered borrowing costs for qualifying firms. Which choice most effectively uses relevant information from the notes to accomplish this goal?