With respect to research on the Balanced Scorecard and issues related to cause-and-effect of KPIs used, which statement is not true: Question 4Select one: a. Correlations between KPIs permit sound compensation of managers b. There is a time lag between measures taken across KPIs ranging from 6 to 18 months c. Empirical research has found weak and mixed results on cause-and-effect d. The longer the period, external factors may explain the correlations between KPIs