In the syllabus there are a few specified groups that are listed, Id suggest you look at those...Potential groups you could look at
-Government: (I'm fairly sure this would qualify as a group...you might need to as a teacher to make sure) - this would allow you to look at the policies that led to the creation and formation of the Cold War from both the USSR and USA perspective. Also, you can look at propaganda efforts to influence public opinion against the adversary
-Military-Industrial Complex: In the US, about 10% of the entire economy was devoted to the production of military supplies. Some historians have argued that the Cold War mentality was maintained to keep the economy moving along. In the USSR the percentage used on military production was much larger, but as their economy was command-based there was less need to justify it.\
-NATO/Warsaw Pact: You can look at the affect of these international groupings and the tendency for international relationships to be divided between two camps. You could also look at the UN and its attempts to defuse the various Cold War Crises and its inability to mediate between the US and the USSR.
That's all I've got at the moment - you should check out the syllabus listing of relevant groups. IF the question asks you to 'evaluate or assess' you need to come up with some sort of conclusion about how important these groups were in creating and maintaining the Cold War. So, were the governments, military-industrial complexes. international organisations and other groups important in creating the Cold War, and then keeping it going.