I'm not going to answer your question directly because that would defeat the purpose of the assignment. However, I will help you think about it.
First, think about what you have learned or would need to learn to know more about NOW and AIM. You probably want to learn something about their missions and core values. If you've been studying it, review your notes and your reading. Then make a list of some key points. If you don't have that information handy, look at this website for a summary of NOW goals: https://now.org/issues/ and this website https://static1.squarespace.com/static/5564875fe4b0a715f94b3b42/t/5805143b03596ee0fd84ee3e/1476727898439/AIM+booklet+FINAL_sm.pdf for a summary of AIM goals.
A quick glance at the NOW site shows that some of their core values are somewhat controversial, such as legalizing abortion and the goal of economic justice. I know some women oppose abortion and think it is immoral. As for economic justice, I'm not sure how NOW proposes to achieve that, but some women might not like their methodology. I would think you would find similar things with Native Americans and AIM, only they may be more focused on methodology because it is hard to see how people would oppose the general goals of civil rights.