Answer:
Group think
Explanation:
Groupthink is a group policy-making method in which the interest of such a group is prioritized without given preference to the implication of such decision when taken. It takes into account group unity rather than objective decisions.
In the illustration given, Jeff is not sure about the success of the new product. He kept this opinion to himself for the fear of breaking the unity of the team. This type of Scenario where a group of people think and make decisions alike is groupthink