The Spanish class system placed people in the top class primarily based upon how much American blood a person had.
how much Spanish blood a person had.
where a person worked.
whom a person married.

this year in rap and hip hop radio

a)scientists

explanation:

the national defense education act had two main goals. the first one was to provide personal that was oriented to defense, including scholars, engineering students and so on. the other goal was to provide financial assistance for the students who would be enrolling at colleges and universities in the 1960s.

in 1897, pershing became a tactical officer at west point, and that's where he was given the nickname "black jack." pershing's first name is "john," for which "jack" is a nickname, and he was a white man who commanded black troops. hence "black jack".

a.   it resulted in widespread unemployment.