Who was at the top of the social class structure in inca society a- sapa inca b- farmers c- nobility d- merchants

Ineed to have answers for numbers 2-4 reply to this question

Ineed asap! ! what is the name of the system in which each branch of the u.s government can limit the actions of the other branches? a. perpetual union b. division of powers c. cooperative federalism d. checks and balances

What new deal programs would have had the largest impact on rural electrification during the 1930s?