Tính: \(\large \dfrac{1}{2} + \dfrac{1}{6} + \dfrac{1}{12} + \dfrac{1}

Tính: 
\(\large \dfrac{1}{2} + \dfrac{1}{6} + \dfrac{1}{12} + \dfrac{1}{20}\)
 

• A. \(\large \dfrac{7}{3}\)
• B. \(\large \dfrac{2}{3}\)
• C. \(\large \dfrac{4}{5}\)
• D. \(\large \dfrac{3}{7}\)