A.\(f\left( x \right) > 9 \Leftrightarrow {x^2} + 2x{\log _3}2 > 2\)
B.\(f\left( x \right) > 9 \Leftrightarrow {x^2}{\log _2}3 + 2x > 2{\log _2}3\)
C.\(f\left( x \right) > 9 \Leftrightarrow 2x\log 3 + x\log 4 > \log 9\)
D.\(f\left( x \right) > 9 \Leftrightarrow {x^2}\ln 3 + x\ln 4 > 2\ln 3\)