The Flexner report was spurred by the fact that: a. The thousands of medical schools in North America had little unity of purpose or of standards
b. The majority of medical schools were using the same standards but it wasn't written down explicitly for all to see
c. It was time for a fresh look since the last study of this kind was done 50 years before the Flexner report
d. The Carnegie Foundation wanted to establish itself as an overseer of medical schools