Strategies for reducing racial prejudice have been proved and been successful over years for African Americans. They have set core strategies which address both institutional and individual sources of prejudice and discrimination in the contexts and situations in daily life. African american strategies have proved to influence the behavior of individuals, including their motivation and capability to influence others, and not be limited to efforts to increase knowledge and awareness. They had identified racial and ethnic groups involved including participants who reflect the racial, ethnic, and linguistic diversity of the context .
Reference: Southern Poverty Law Center,Teaching Tolerance, Strategies for Reducing Racial and Ethnic Prejudice: Essential Principles
Because African Americans dealt with and are dealing with discrimination that has been felt for hundreds of years. African Americans started the civil rights movement which ultimately established that they’re tired of being treated like 2nd rate citizens and deserve a place in this country just like white people. They’re admirable for they’re accomplishments, that’s why
America didn't want to annex Texas, so I am assuming that it didn't want Texas to elect officials, since they didn't care really. All the other answers seem right.