What is the value of \(\frac{{{{\left( {0.7} \right)}^3} - {{\left( {0.4} \right)}^3}}}{{\left[ {{{\left( {0.7} \right)}^2}\; + \;{{\left( {0.4} \right)}^2}\; + \;\left( {0.7} \right)\; \times \;\left( {0.4} \right)} \right]}}?\)

• A. 0.5
• B. 0.2
• C. 0.3
• D. 0.1