The correct term for strict, rigid, and specific statements that inform what is to be done is "Rule." Therefore, the answer is (2) Rule.

Policy: A policy is a broad guideline or principle that provides a framework for decision-making. It is not a specific statement but a more general statement of intent. Policies may guide the creation of rules, procedures, and objectives, but they are not themselves strict and rigid statements of what is to be done.

Objective: An objective is a specific goal or target to be achieved. Objectives are not statements that inform what is to be done but rather what is intended to be achieved. They are not necessarily strict or rigid; they are more about outcomes.

Procedure: A procedure is a set of steps or actions to be followed in a particular order to achieve a specific task or goal. Procedures are more detailed than rules, but they are still not typically described as "strict and rigid" in the same way that rules are. Procedures are often more flexible in implementation.