In reaction to public and government pressure caused by the Red Scare, Hollywood attempted to track down communist leaders by creating lists of individuals whose loyalty was questionable. What were these lists called?

a.
whitelists.

b.
greenlists.
c.
redlists.

d.
blacklists.

Please be 100% sure on your answer because I really need it to be correct and please answer this ASAP I'll appreciate it so much please