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What development in 1955 marked the beginning of Martin Luther King, Jr. s career as a civil rights leader?

Ae argued the "Brown v. the Board of Education" case before the Supreme Court.
Be organized a bus boycott in Montgomery, Alabama.
Ce was awarded the Noble Peace Prize.
De led a march on Washington,
D.

Verified Answer :

"He organized a bus boycott in Montgomery, Alabama" was a development in 1955 that marked the beginning of Martin Luther King, Jr. s career as a civil rights leader since this was such a high-profile event.

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