Final answer:
The statement about managerial activity being decision making is false, as it actually refers to the controlling function. Dillon's Rule also falsely claims to give local governments decision-making freedom; it does not, as it limits local powers to what is expressly granted by the state.
Step-by-step explanation:
The managerial activity of monitoring a plan's implementation and taking corrective action as needed is referred to as controlling, not decision making. Therefore, the statement is false. Decision making, on the other hand, is the process of choosing among competing alternatives and typically occurs before and during the planning process. Controlling involves measuring performance, comparing it with goals, and making adjustments as necessary.
In contrast to the assertion about managerial activity, Dillon's Rule states that local governments have only those powers that are expressly conferred upon them by state law, a constitutional provision, or implied or incidental to the powers expressly granted. As such, Dillon's Rule does not give local governments the freedom and flexibility to make decisions for themselves, and the correct answer here is false.