Final answer:
Rosa Parks' refusal to give up her seat and subsequent arrest sparked the Montgomery Bus Boycott and played a crucial role in the civil rights movement, making statement b) the true one.
Step-by-step explanation:
According to the presentation, the statement about Rosa Parks that is true is: b) Rosa Parks changed America and the world with her small act of courage. On December 1, 1955, Parks refused to give up her seat on a bus to a white man, challenging racial segregation laws. Her arrest prompted the Montgomery Bus Boycott, led by prominent figures such as Dr. Martin Luther King Jr., Jo Ann Robinson, and E.D. Nixon. This boycott became a pivotal moment in the civil rights movement and had a significant impact on the fight for racial equality both in America and around the globe.