A historian is awarded a grant to study the effects of industrial air pollution on sugarcane farms in Brazil. His research will focus on which major historical theme A. Interactions between humans and the environment B. Development and interaction of cultures C. Development and transformations of sociaol structures D. Creation, interaction, and expansion of political systems.

explanation:

hi

answer:

won re-nomination with no opposition he also had the support of his party

explanation:

it saw incumbent president andrew jackson, candidate of the democratic party, defeat henry clay, candidate of the national republican party. jackson won re-nomination with no opposition, and the 1832 democratic national convention replaced vice president john c. calhoun with martin van buren.

john maynrd keynes developed new economic respose to the                           ( b. great depression if the 1930's)

the correct answer is 50.