Yes Buddhism's do believe in reincarnation!!
This represents the source of research ideas called classroom lecture.
There are several sources which can inspire and help someone to develop a research question. Some of them are theory, everyday occurrence, serendipity and past research. In this case, Whitney was taught about the bystander effect in her social psychology course and she was inspired to undertake an undergraduate research project on this subject.
The best answer to this question is: a unitary state (the correct answer is b).
A unitary state is a state with a central power, one where the government has the power and administration of the whole country and where there are no autonomous regions, such as states. The "opposite" of a unitary state is a federation.