A. complex sentences have many cluses
Option D is the right answer.
The Montgomery Bus Boycott was a major success of the Civil Rights movement. This boycott was a social and political protest campaign against the doctrine of racial discrimination in public transportation. The boycott began when an African- American lady was imprisoned for denying to quit her chair to a White man. And this protest resulted in the Supreme Court's verdict that claimed the Montgomery and Alabama laws that segregated buses were illegal.
Antietam enabled the Union to repel the first Confederate invasion of the North, The battle allowed Abraham Lincoln to issue the Emancipation Proclamation, Antietam kept Britain and France on the sidelines, The battle lifted sagging Union morale, Photographs from Antietam brought the horror of war to Americans for the first time, The battle may have saved Lincoln from a resounding defeat in midterm elections, Antietam marked the beginning of the end for General George McClellan.
<span>promoting human rights is less important to American foreign policy than security concerns and economic interests.</span>