May you please add what your choices are? it is a little hard to answer without any information.
The best answer is the following one;
tried to force people to improve their morals.
The prohibition tried to make people stop drinking alcohol, which can be seen as "noble". People did not decide it themselves but it was forced on them, so it is justified to say that the law during the Prohibition time tried to force people to improve their morals.
Answer:
Because eventually over time they couldn’t support their troops. Welp, I tried. Hope this is right! God bless you!
Segregation was an useful tool in preserving the economic and social dominance of the white southerners. With segregation the African Americans were being discriminated against and kept in socially inferior position thus enabling the whites to get better paying jobs and generally better positions thus continuing the cycle of economical dominance of the white southerners.