Simplest value of \(\frac{1}{2} + \frac{1}{6} + \frac{1}{{12}} + \frac{1}{{20}} + \frac{1}{{30}} + \frac{1}{{42}} + \frac{1}{{56}} + \frac{1}{{72}} + \frac{1}{{90}}\) is

• A. \(\frac{1}{10}\)
• B. \(\frac{1}{9}\)
• C. \(\frac{8}{9}\)
• D. \(\frac{9}{10}\)