medium · GMAT Verbal
A software company instituted a mandatory peer code-review process, requiring every code change to be reviewed by at least one other engineer before deployment. In the year after the process began, the number of bugs reported by customers after release fell by 45 percent compared with the previous year. Company leadership concluded that the new review process caused the decline in customer-reported bugs.
Which of the following, if true, would most strengthen leadership's conclusion?
- The company's total number of software releases stayed roughly constant across both years, even as the size and complexity of each release grew.
- Reviewers frequently caught and corrected logical errors in code changes before those changes were deployed to customers.
- The company hired several senior engineers during the same year.
- Customer satisfaction with the software's user interface improved during the same year.
- The company's revenue grew during the same year.
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