By the end of 1877,

a) most white southerners had put their sectional feelings largely behind them and were almost fully part of the union culturally and economically again.
b) there was almost no hope left for “forty acres and a mule” by those who once had it.
c) the national government was weaker than it had been before the civil war.
d) most former slaves had migrated out of the south to sections of the country where there was less prejudice and segregation against them.

I believe the answer is D. most former slaves had migrated out of the South to sections of the country where there was less prejudice and segregation against them.

1920 census

the census was scheduled for january the 1st, as the government believed that more farmers would be in their homes by that time instead of april. the census did not ask about unemployment, the number of children, and how long was a couple married were not taken into consideration. individuals were considered as residents of the places they normally slept, not the places were they worked at or visited.

2010 census

the census was scheduled for april 1st, 2010. it was the shortest census in history: it only contained 10 questions related to name, age, gender, ethnicity, relationship, and whether the citizen owned a home or rented one. the government launched a website in order to provide the citizens with information regarding the census. there were also "teach census weeks" in schools nationwide.