The correct answer is E) Lyndon B. Johnson.
The US president that worked with civil rights leaders to secure equality and liberty was Lyndon B. Johnson.
President Lyndon B. Johnson signed the Civil Rights Act on July 2, 1964. It represented the most important act in the United States. The act covered many important issues on civil rights in America such as the prohibition of racial discrimination in public schools, the prohibition of racial discrimination in the workplace and in public facilities. The Civil Rights Act was an important step for the US government. So yes, the US president that worked with civil rights leaders to secure equality and liberty was Lyndon B. Johnson.