Which of the following demonstrates a lack of cooperation with coworkers?

The choice that indicates a lack of cooperation with coworkers is doing all the work without seeking input or involvement from them. Effective teamwork relies on collaboration, communication, and shared responsibilities. When one individual takes on all tasks independently, it not only undermines the team's ability to pool ideas and skills, but it can also lead to feelings of exclusion among coworkers, which can negatively impact morale and cohesion within the group. This behavior prevents others from contributing their insights or expertise, which are crucial for creating a well-rounded outcome.

By contrast, the options that involve voting on lunch or dividing up work while assessing progress highlight collaborative efforts where everyone has a say or a role. Asking for opinions demonstrates openness to feedback, fostering a cooperative environment.