If these were the missing choices:
A. aliens
B. single men without a degree
C. people with valuable job skills
D. husbands, wives, and children of U.S. citizens.
My answer is B. Single men without a degree.
This immigration act provided family based immigration visa, created five distinct employment based visas, categorized by occupation, as well as diversity visa program. There were also changes in non-immigrant visas like the H-1B visa for highly skilled workers. There were also cutbacks in the allotment of visas available for extended relatives.