Final answer:
The defining characteristics of a team are A. that members work together, need one another, and share common goals. The location is not a restrictive factor due to the prevalence of virtual teams, thus making option C the most accurate choice.
Step-by-step explanation:
The defining characteristics of a team encompass several key aspects. They include the need for team members to work together, the interdependency where members need one another, the requirement of having common goals, and also, depending on the context, regular meetings to discuss and progress towards those goals.
The idea of teams being in the same geographical location is outdated, especially with the advent of virtual teams, where digital communication allows for collaboration across distances. So, the most accurate definition would be that a team's defining characteristics are that they work together, need one another, and share common goals, aligning with option C from the provided choices.