Why were efforts to improve life for Blacks in Northern cities frustrated?

In the 50 years following the end of Reconstruction, African Americans transformed American life once more: They moved. Driven in part by economic concerns, and in part by frustration with the straitened social conditions of the South, in the 1870s African Americans began moving North and West in great numbers. In the 1890s, the number of African Americans moving to the Northeast and the Midwest was double that of the previous decade. In 1910, it doubled again, then again in 1920. In the 1920s, more than 750,000 African Americans left the South--a greater movement of people than had occurred in the Irish potato famine of the 1840s.

Explanation:

ngai (engai, enkai, mweai, mwiai) is the monolithic supreme god in the spirituality of the kamba and kikuyu of kenya.ngai is creator of the universe and all in it. the kikuyu worshiped ngai facing the mt. kirinyaga (mount kenya) while prayers and goat sacrificial rituals were performed under the sacred mugumo tree (a fig tree species). ngai often was referred to as "mwene nyaga" meaning (the owner of the mountain).

it means that maasai people think that mount kenya is something to be worshipped along with god.when cattle or children cause problems,maasai elders just warn them that children must mend their bad ways or their god might punish them.this serves as law and order tool to maintain peace among maasai tribe.the maasai are an indigenous ethnic group in africa of semi-nomadic people settled in kenya and northern tanzania. due to their distinct traditions, customs and dress and their residence near the many national game parks of east africa, the maasai are among the foremost african ethnic groups and are known internationally because of their links to the national parks and reserves.

traditional maasai people's lifestyle concentrates on their cattle which make up the primary source of food. amongst the maasai and several other african ethnic groups, the measure of a man's wealth is in terms of children and cattle. so the more the better.

the answer would more than likely a.)falling crop prices  

hope the answer is right and ,either way have a nice day.