LSAT Logical Reasoning Question of the Day

The company now only hires persons with a post-graduate degree. Further, the company prefers to hire employees with significant work experience. Performance evaluations over the years have shown, however, that new hires with significant work experience outperform those without such experience, regardless of education level. Therefore, if the company relaxes the degree requirement and makes significant work experience mandatory, overall employee performance among new hires should increase.

Which one of the following is an assumption that would allow the conclusion above to be properly drawn?