Чему равна сумма дробей

\(\displaystyle \frac{3}{7}+\frac{1}{7}=\,?\)

• \(\displaystyle \frac{4}{14}\)
• \(\displaystyle \frac{5}{7}\)
• \(\displaystyle \frac{4}{7}\)
• \(\displaystyle \frac{1}{7}\)