The correct answer is C. Postulates.
A postulate is a statement that is assumed to be true without proof. It is a basic assumption that is used to build a logical argument. Postulates are often used in mathematics and science to establish the foundation for a theory or proof.
Maxims are general principles or rules of conduct that are considered to be true or right. They are often used in everyday life to guide decision-making and behavior.
Tenets are beliefs or principles that are held to be true or important. They are often used in religious or philosophical contexts to guide thought and action.
Stipulations are agreements or conditions that are made before an event or action takes place. They are often used in legal or business contexts to ensure that all parties involved understand and agree to the terms of the agreement.
In the context of the question, postulates are the statements that are taken for granted. They are the basic assumptions that are used to build a logical argument. Without postulates, it would be impossible to prove any theorems.