Which of the following is a branch of mathematics that studies the nature of mathematical truth and the relationship between mathematics and reality?

Which of the following is a set of axioms that is used to develop the rest of mathematics?

Which of the following is a logical system that is used to study the foundations of mathematics?

Which of the following is a mathematical theory that studies the properties of sets?

Which of the following is a mathematical theory that studies the properties of numbers?

Which of the following is a mathematical theory that studies the structure of algebraic objects?

Which of the following is a mathematical theory that studies the properties of functions and limits?

Which of the following is a mathematical theory that studies the properties of geometric objects?

Which of the following is a mathematical theory that studies the properties of topological spaces?

Which of the following is a mathematical theory that studies the properties of differential equations?

Which of the following is a mathematical theory that studies the properties of probability distributions?

Which of the following is a mathematical theory that studies the properties of statistical data?

Which of the following is a mathematical theory that studies the properties of optimization problems?

Which of the following is a mathematical theory that studies the properties of game theory?

Which of the following is a mathematical theory that studies the properties of financial markets?