The transfer function of a phase lead compensator is given by\(D\left( s \right) = \frac{{3\left( {s + \frac{1}{{3T}}} \right)}}{{\left( {s + \frac{1}{T}} \right)}}\)The frequency (in rad/sec), at which ∠D(jω) is maximum, is

• A. \(\sqrt {\frac{3}{{{T^2}}}}\)
• B. \(\sqrt {\frac{1}{{3{T^2}}}}\)
• C. \(\sqrt {3T}\)
• D. \(\sqrt {3{T^2}}\)