已知\(x _{1} = lo{g}_{ \frac{1}{3}} 2\)，\(x _{2} = {2}^{− \frac{1}{2}}\)，\(x _{3}\)满足\(( \dfrac{1}{3}{)}^{{x}_{3}} =\log _{3} x _{3}\)，则\((\:\:\:\:)\)
A. \(x _{1} < x _{3} < x _{2}\)
B. \(x _{1} < x _{2} < x _{3}\) C. \(x _{2} < x _{1} < x _{3}\) D. \(x _{3} < x _{1} < x _{2}\)
