What was the primary way the NAACP challenged discriminatory policies?

They led many boycotts of major retailers in an effort to force change.

They took a legal approach to force changes to the way things were being done.

They urged African Americans to resist discrimination "by any means necessary".

They voted in large numbers to elect politicians sympathetic to their cause.

They took a legal approach to force changes to the way things were being done.

Explanation:

you aint got nothin on my lil weenies

answer: the purpose of the "index of forbidden books" was to prevent the contamination of the faith or the corruption of morals of roman catholics according to canon law, through the reading of theologically mistaken or immoral books. the condemnation of published books, thus listed in the index librorum prohibitorum.

explanation: index librorum prohibitorum, (latin: “index of forbidden books”), list of books once forbidden by roman catholic church authority as dangerous to the faith or morals of roman catholics. publication of the list ceased in 1966, and it was relegated to the status of a historic document.

the 20th and final edition appeared in 1948, and the index was formally abolished on 14 june 1966 by pope paul vi. the aim of the list was to protect the faith and morals of the faithful by putting a stop to the reading of theologically, culturally, and politically disruptive books.