What is the maximum duration of a Sprint?

Correct answer: Four weeks

Option A is correct because the Scrum Guide defines the maximum Sprint length as one calendar month (four weeks); this upper bound exists to limit complexity, ensure frequent inspection and adaptation, and reduce risk. Option B is wrong because one week is a valid and common Sprint length but is the minimum practical duration, not the maximum. Option C is wrong because two weeks is also a frequently chosen Sprint length in practice, but it is not the defined maximum. Option D is wrong because six weeks exceeds the Scrum Guide's maximum of four weeks and is not a valid Sprint duration under the official Scrum framework.