Final answer:
White-collar positions such as clerical, managerial, or professional occupations expanded significantly in Western Europe by the 1960s.
Step-by-step explanation:
By the 1960s, one segment of the labor force that had expanded significantly in Western Europe was white-collar positions such as clerical, managerial, or professional occupations. As the shift from an industrial-based to a service-based economy took place, numbers of workers in fields like sales, advertising, insurance, and communications rose rapidly.