Answer:
Sara and Juan (Uncooperative Teammates)
The action that is least likely to improve their cooperation is:
4) Reassign their tasks so that they are working on very different aspects of the team’s project.
Step-by-step explanation:
Option 4 makes it impossible for Sara and Juan to come together or work on an aspect of the team's project. It is the most unlikely way of improving cooperation between the two. If they continue being unwilling to work together, the team's productivity and morale will deteriorate. Resentment will grow as costs are overrun, causing loss of business and weakened workplace culture. Overall, the team will not be able to achieve its goals because the poor relationship will gradually permeate the team's spirit.