A project manager and key team members were preparing a RACI chart for the major project work packages and activities. In each row they only assigned one "A" (for Accountable) to a single resource. Why did they feel it was necessary for only one person to be assigned the primary accountability for each activity? a. Because only one person should do the work on each activity or work package b. Because the project manager is always the person who is accountable for each activity or work package c. Because if more than one person has accountability, it is too easy for them to blame each other when something goes wrong d. Because there are rarely enough people on a project team to have more than one person be accountable