The probability of an event A is 1/5. The probability of B is 1/3 . The probability both A and B is 1/15. What is the probability of either event A or B or both

• A.\( \frac{2}{15} \)
• B.\( \frac{3}{4} \)
• C.\( \frac{7}{15} \)
• D.\( \frac{1}{15} \)
• E.