What is the value of \(\frac{{\left( {{{\left( {0.5} \right)}^3} \:-\: {{\left( {0.1} \right)}^3}} \right)}}{{{{\left( {0.5} \right)}^2}\; + \;0.5\: \times\: 0.1\; + \;{{\left( {0.1} \right)}^2}}}\;?\)

• A. 0.1
• B. 0.4
• C. 0.5
• D. 0.6