Чему равна сумма дробей

\(\displaystyle \frac{2}{6}+\frac{1}{6}=\,?\)

• \(\displaystyle \frac{2}{6}\)
• \(\displaystyle \frac{3}{12}\)
• \(\displaystyle \frac{3}{6}\)
• \(\displaystyle \frac{4}{6}\)