A grade of B is worth how many grade points?

The correct answer is B. 3.0.

In many grading systems, particularly in the United States, a grade of B is typically worth 3.0 grade points on a 4.0 scale. This scale often designates an A as 4.0, a B as 3.0, a C as 2.0, and so on. If you have more questions about grading systems or need further clarification, feel free to ask!