When a task can’t move forward is the correct answer. When an issue is focused on specific roles, the agile team leader should not bring the team together to solve the problem. The other answers are incorrect: Determining a project’s cost
reduction is not a team problem-solving exercise, and it usually happens with the product owner and value management team, before the start of the project; the team should be brought together when every member has the potential to
give valuable input on the issue. For example, a technical writer probably can’t help solve a coding issue, nor could a developer likely have an opinion on how trainers should standardize their documentation.