What constitutional rights did Nation of Islam adherents help win in prison during the 1960s and 1970s?
a) Right to bear arms, including the right of prisoners to own or possess a weapon
b) Freedom of speech, including prisoners' political speech and prisoner protest
c) Freedom of religion, including the right to a pork-free diet or religious reading material
d) Freedom of movement, including the right to move to a prison closer to home or family