Why did they kill the Roma?

Purify the race.

Explanation:

Nazis had the Nietzsche philosophy of the Super Man, who have the power over his own feelings. This idea was misrepresented by the Nazis to justify their xenophobia against Jewish people. They believe that a Super Man could exist only from their race, they even did experiment with Jewish people to see if they could change biological characteristic into theirs.

Hope this helps?

i discarded the supernatant and kept the pellet in this part of the experiment because you have to return all unused chemicals into their original containers at the end of each labratory.

explanation:

the answer is prolly b