Projects generally have multiple tasks going on at one time. With this being said it would definitely be possible for the project to have multiple priorities going on at one time. There will be tasks that have a greater priority than others, of course. However, it is crucial to determine which tasks are more important, and which will take longer. This is crucial so that project can be completed on time. Otherwise, deadlines may be missed, and money could be lost. Another point I would like to make in response to your question would be that the amount of possible priorities is most likely dependent upon the amount of team members in the group. If it is a small group than the project’s priorities will probably be completed more linearly, as in one after the other. If it is a larger group than multiple priorities can be focused on as there exists more helpful hands to complete different tasks.