Theory i believe? hope this helps
Its the periodic movement if that what your asking for
The term that best completes the statement above is SERVICE WORKERS. The increase for the demand for service workers has created more employment opportunities for women during the years 1960s and 1970s. This is the era when women are now assigned in jobs related to providing services.
It was Bolsheviks (I am not sure if I remember correctly but it should mean something like "majority" but I am not 100% sure).
A.He founded the first permanent Frech settlement in North America
This is when he landed in Canada and was named the father of new France.