The correct answer is B) to have access to supporting information.
Vishal should take notes in preparation for a group discussion to have access to supporting information.
If you want to be productive in your meetings, you have to prepare the topics at hand. And taking notes that help you to support your arguments is a good way to be ready for a group discussion. Otherwise, you probably are going to improvise or give general information that is not accurate. But if you take notes, you will have the tools, numbers, data or statistics at hand to support your discussion and arguments.