**A**

A. A set of mathematics topics that is relevant to introductory physics courses.

The physics primer is not defined as the online comprehensive mathematics textbooks. Physics Primer consists of tutorials, videos, and answers to specific questions, the main idea is to build a solid structure of math concepts for introductory physics. It is the set of topics of mathematics that gives students trouble and remember. Therefore, it is defined as the process of physics problem-solving. So, mathematical skills are covered in the physics course as a primer related to success. Therefore, it is a set of topics of mathematics that are relevant to introductory physics.

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