The suggested answer is C.
To determine the number of communication channels in a project, use the formula n(n-1)/2, where n is the total number of stakeholders. In this case, we have four main stakeholders, one project manager, and four other team members, making a total of 9 people. Plugging the values into the formula, we get 9(9-1)/2 = 9*8/2 = 72/2 = 36. Therefore, the number of communication channels available is 36.