What is the value of \(\left( {\frac{{{x^2} - x - 6}}{{{x^2} + x - 12}}} \right) \div \left( {\frac{{{x^2} + 5x + 6}}{{{x^2} + 7x + 12}}} \right)\)

• A. 1
• B. (x - 3)/(x + 3)
• C. (x + 4)/(x - 3)
• D. (x - 3) (x + 4)