In the passage, the author anticipates which of the following as a possible objection to her argument？

A. It is uncertain how many people actually migrated during the Great Migration.
B. The eventual economic status of the Great Migration migrants has not been adequately traced.
C. It is not likely that people with steady jobs would have reason to move to another area of the country.
D. It is not true that the term “manufacturing and mechanical pursuits” actually encompasses the entire industrial sector.
E. Of the Black workers living in southern cities, only those in a small number of trades were threatened by obsolescence.