President Eisenhower's most important and far-reaching domestic initiative was the passage of the Interstate Highway and Defense System Act of 1956. funding for a huge increase in Social Security benefits. the most progressive civil rights bill since Reconstruction. the establishment of the Department of Health, Education, and Welfare.

WYDGWUQGQWYGQUQGYUQS

Explanation:

It's option a. The passage of the Interstate highway and defense system act of 1956

Explanation:

President Eisenhower's most important and far-reaching domestic initiative was the passage of the Interstate Highway and Defense System Act of 1956. It was hi s most ambitious and pushing domestic project. The Interstate Highway program, which was created in 1956, made over a 41,000-mile road system.