[单项选择]The schools （） black children went were simply not good enough.
A. to which
B. to that
C. in which
D. in that

Black people were first taken to North America as slaves in the seventeenth century. Sold by Arab or Mrican slave-traders in West Mrica, they were on the tobacco, sugar and cotton plantations.
Towards the end of the eighteenth century, more and more people began to condemn (谴责) slavery, but it was not until after the bitter Civil war-between the Northern and Southern states of America that is was abolished there. In 1865 the 13th Amendment to the Constitution gave blacks the right to live and work where they liked. Then ,in 1867, came further legislation (立法)guaranteeing citizenship and other civil rights.
However, there were setbacks almost immediately. The Supreme Court declared the civil rights legislation of 1867 unconstitutional and a number of new segregation (种族隔离)laws were enacted. Consequently ,as more and more blacks deserted the rural areas in search of work in the cities, they found themselves forced to .live in areas with the worst housing and
A. Slavery was finally abolished in 1867.
B. The Civil right Commission was formed to ask for better conditions and more rights, than the white people.
C. After blacks can be educated in the same schools and colleges as whites, the discrimination in employment also reduced.
D. There are more and more black entertainers, sports stars, businessmen and politicians.