You manage a product development organization. You are looking at the progress reports from a number of Scrum Teams in your organization, when you notice that while most teams have a velocity of 35-40 story points per Sprint, one team consistently delivers only 15-20 per Sprint. Is this cause for concern? (choose the best answer)
A. es, this is cause for concern - the Scrum Master for this team is not making this team as productive as the others
B. o, this is not cause for concern - velocity is not a meaningful measurement of the value delivered by agile teams
C. es, this is cause for concern - the Product Owner for the team in question is not pushing the team hard enough
D. es, this is cause for concern - the team in question has not calibrated their story points with the rest of the teams
E. es, this is cause for concern - the team in question is performing worse than the rest
F. o, this is not cause for concern - the team in question will probably increase their velocity over time