At Agency Z, a supervisor recently transferred from Team A to Team B. Since the move, Team B's productivity numbers increased six weeks in a row. The Office Director concluded that the supervisor's reassignment to Team B is a direct cause of the increased productivity. Which of the following statements, if true, would most strengthen the above conclusion? radio_button_unchecked Several members of Team A have left the Agency since the supervisor transferred. radio_button_unchecked Team B's productivity was unusually low during the two-week period before the new supervisor arrived. radio_button_unchecked Due to the nature of Team B's work, it takes at least six weeks for any new policies or procedures to have an impact on the team's productivity numbers. radio_button_unchecked Team B's new supervisor has previously led several other teams to increased productivity. radio_button_unchecked Team B has increased its staff by 50 percent since the new supervisor arrived