What is the minimum value of \(\frac{{{a}^{2}}}{{{\cos }^{2}}x}+\frac{{{b}^{2}}}{{{\sin }^{2}}x}\) where a > 0 and b > 0

• A. (a + b)2
• B. (a - b)2
• C. a2 + b2
• D. |a2 + b2|