Advanced Placement (AP) Computer Science 2025 – 400 Free Practice Questions to Pass the Exam

B is the correct choice because a mathematical expression is fundamentally composed of operators (such as +, -, *, /), numbers (which represent numerical values), and symbols (which can include parentheses or other notation that helps in structuring the expression).

Operators serve as the actions or operations to be performed on the numbers, while the numbers provide the raw values where these operations apply. Symbols, such as parentheses, govern the order of operations, ensuring that the expression is evaluated in a specific sequence.

The other options do not accurately reflect the essential components of mathematical expressions. For instance, strings and comments are elements related to programming syntax, rather than the makeup of mathematical expressions. Data types and control structures pertain to how data is stored and manipulated in programming, and functions and methods refer to blocks of code that perform specific tasks, neither of which constitute a mathematical expression in itself.