The American Social Security System, established by the New Deal, differed from most European social welfare systems primarily because it a was opposed by large sectors of the public. b did not initially cover all categories of workers. c linked unemployment and disability insurance to old age pensions. d did not permit the Social Security number to be used for identification and security purposes. e did not address the issue of single mothers in the home with dependent children

b. did not initially cover all categories of workers.

Explanation:

The American Social Security System was very different from what we know today, in its early years of establishment, during the New Deal. The main difference was that it did not cover all professional categories (which made it different from the European pension system). Professional categories were included in this system as the US economic condition strengthened through other New Deal reforms. This happened little by little, until it became what we know today.

its d i know cause i've been googling it

answer; archaeologists;