I think this process would be Decision-Making, because the scenario is that you have to decide on what topic you are going to pick, based on research and what you think would be the best resolution. I don't think that Conflict resolution would be correct because there is no conflict and neither Negotiation nor Verbal Communication have anything to do with this, so i believe it's safe to assume the correct answer would be Decision Making.
We can define a buffer as a temporary holding area for data between the various devices and the CPU make I/O synchronization especially if there are multiple devices attempting to do I/O at the same time.
Items stored at the buffer helps to reduce the The incompatibilities in speed between the various devices and the CPU.