A rational number is a number that can be expressed as a fraction \( \frac{a}{b} \) where \( a \) and \( b \) are integers and \( b \neq 0 \).
From the options given:
- \( 2 - \sqrt{2} \) is not a rational number because \( \sqrt{2} \) is an irrational number, so the difference is also irrational.
- \( 14 \) is a rational number because it can be expressed as \( \frac{14}{1} \).
- \( \frac{1}{4} \) is a rational number because it is already in the form of a fraction \( \frac{1}{4} \).
- \( \pi \) is an irrational number and cannot be expressed as a fraction.
Therefore, both \( 14 \) and \( \frac{1}{4} \) are examples of rational numbers. However, if you can select only one answer, the best answer would be:
14