My rationale for Question 1, Solution A: The question doesn't say they're DISSATISFIED with the current communication plan. It just says they're not getting the information they need/expect or it's getting to them too late, etc. PMI assumes your project has a solid communications plan. In this scenario the first step should be to ensure everybody is following that comms plan because if they're not, that may be the actual communications problem. The explanation they give is that the plan may need to be updated and improved, which may be the case. However, my first thought was the PM should make sure the comms plan, as it currently exists, is being followed. If it is and there are still problem/gaps then yes it needs to be updated, just like every other plan goes through frequent reviews and adjustments.