According to the Kaiser Family Foundation's Employer Health Benefits Survey 2020, when large companies offer health benefits and a wellness or health screening program, one expectation is that the programs will be effective at reducing the company's healthcare costs. The survey found that

a. more employers thought the program was only slightly effective than thought the program was very effective

b. more employers thought the program was moderately effective than only slightly effective

c. more employers didn't know if the program reduced costs than thought the program was very effective

d. more employers thought the program was not at all effective than thought the program was very effective