ledge Check ent: Chapter 4 Knowledge Check mo2le03h_ch04.03m Why was the Kefauver-Harris Amendment of 1963 enacted? O a. to keep drug manufacturers from making worthless or dangerous drugs available to the public. O b. to keep drug manufacturers from distribution of worthless or dangerous drugs available to the public. O c. to keep drug manufacturers from using specific ingredients O d. to keep drug manufacturers from testing drugs with specific ingredients considered worthless or dangerous