The correct answer is B) slow and difficult.
The sentence that best explains how the Supreme Court Plan for desegregation was implemented is “slow and difficult”.
It was after the Supreme Court decision in Brown v. Board of Education of Topeka of 1954, that the desegregation plan initiated. The Court ruled that segregation in public schools was unequal and was unconstitutional. The Court’s conclusion was that in public education “separated buy equal” was not correct. This decision allow other big changes in America regarding desegregation but those changes were not easy to implement and the process was very slow. Examples of those situations were the case of the Central High School in Little Rock, Arkansas and the Montgomery Bus Boycott. So it is correct to say that the sentence that best explains how the Supreme Court Plan for desegregation was implemented is “slow and difficult”.