In my opinion the fourth answer is more correct (D).
The tax collection system is part of the fiscal policy scope of the government and aims to collect the money to apply in public policies that promote social benefit, which is the same as promoting general well-being.
In this context, raising taxes means more money in the government's hand to target public policies and more social benefit, if properly applied.
There were separate seats for blacks and whites before the Civil Rights Act of 1964, and different public facilities. The black people could not go to the same colleges, sport facilities or restaurants whites entered. That was segregation.