Final answer:
The podcast's purpose is to inform listeners about John Lewis's contributions to securing voters' rights through detailing his activism in the Civil Rights Movement.
Step-by-step explanation:
The purpose of the podcast about John Lewis is likely b) to inform listeners about the role John Lewis played in securing voters' rights. This can be discerned from the provided reference, which mentions John Lewis's involvement in the Selma Montgomery march and his dedication to achieving first-class citizenship for African Americans.
The podcast may aim to educate the audience on the historical significance of his actions during the Civil Rights Movement and to highlight his commitment as an activist and congressman to promoting social justice and democracy.