metallurgy is your answer
The "study of metals and the process of refining (them)...."
Note that it says metal. Metallurgy has the word "Metal" in it, and so is most likely your answer (and is your answer).
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Investing in education or job training
The answer is B.
The Great Migration was the movement of six million African Americans from the Southern U.S. to the North. As you probably know, back in the 1900's, segregation of African Americans was on the rise. At the time, the North was not involved in this segregation, so African Americans migrated to the Northern states to escape discrimination.
It was located in San Francisco