Final answer:
Jackie Robinson proposed patience and self-respect in his letter to President Eisenhower as an approach to advancing civil rights.
Explanation:
Jackie Robinson's proposed solution in his letter to President Eisenhower was patience and self-respect. In his letter, Robinson emphasized the importance of nonviolent pressure and highlighted the necessity for civil rights activists to persistently demand change until it is achieved.
Learn more about Jackie Robinson's proposed solution in his letter to President Eisenhower here:
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