Final answer:
The longer clinicians are out of school, the bigger the gap in their knowledge of up-to-date care.
Step-by-step explanation:
The correct option is longer. The statement means that the longer clinicians are out of school, the bigger the gap in their knowledge of up-to-date care. This is because medical knowledge and practices are constantly evolving, and clinicians need to stay updated by continuing their education and learning about the latest advancements in their field. If clinicians do not actively pursue further education and training, they may fall behind in their knowledge and skills.