Final answer:
"Doc" Counsilman is renowned for integrating a sport science approach in coaching, contributing significantly to swimming, while Robert Rotella is acclaimed in sports psychology, making the correct answer 5) a and b.
Step-by-step explanation:
The successful coach noted for adopting a sport science approach in his coaching is "Doc" Counsilman. As a pioneering swimming coach, Counsilman applied principles of science to swimming techniques, training, and conditioning, becoming one of the first prominent figures in sports to utilize a scientific approach comprehensively. On the other hand, Robert Rotella is better known for his psychological approach to coaching, focusing on sports psychology rather than physical science. Answering option 5) a and b acknowledges both Counsilman's and Rotella's contributions in their respective fields of coaching.