Between $1930$ and the mid $1970\text{'}$s$,$ employer$-$sponsored Indemnity and Service health insurance plans:

a$.$ Were only concerned with paying provider claims and minimizing financial risk for the insured group.

b$.$ Did not require employee$/$insurance plan member cost$-$sharing such as deductibles and co$-$insurance.

c$.$ Offered increasingly comprehensive benefits, including major medical insurance benefits.

d$.$ Showed interest in neither the health of whole populations, nor in plan member use of preventive health care services.

e$.$ a$.,$ c$.,$ and d$.$