Where are presidential candidates formally nominated?
a.at a national convention
b.at a local caucus
c.at a district convention
d.at a state convention

In the United States and in most other wester democracies, the presidential candidates are formally nominated "A.at a national convention," since this is the final step before they go into the general election. 

The answer is; He rejected federal aid for the unemployed.

Explanation:

President Hoover believed in the government being limited in citizens life. He believed the role should be limited and thus causing him to reject federal aid to all of the unemployed people in the United Stated at the beginning of the recession. However in 1930, he did finally help the citizens by establishing the "President's Committee for Employment."