Why did the United Nation's Security Council take no action on the proposed U. N. membership for a Palestinian state?

Which of the following would a historian most likely study to find data

Sarah has been collecting intensive interviews with women who organize in grassroots movements for wages for housework. now she is looking over the interviews and trying to find common themes within them. what part of the research process is she in?

This is for my social studies guide and i can answer 21/22 of it perfectly fine. but can someone tell me what the caste system was, and what divisions/classes that it was apart of it?