Select the option that can replace the question mark (?) in the following equation.\(\frac{{{{\left( {0.2} \right)}^3} - {{\left( {0.1} \right)}^3}}}{{{{\left( {0.2\; + \;0.1} \right)}^2}}} =?\)

• A. \(\frac{3}{{40}}\)
• B. \(\frac{1}{{18}}\)
• C. \(- \frac{7}{{90}}\)
• D. \(\frac{7}{{90}}\)