已知 $\log _{b} 2021>\log _{a} 2021>0$, 则下列结论正确的序号是 ( )
(1) $0.2^{a} < 0.2^{b}$, (2 $\frac{1}{a^{2}}>\frac{1}{b^{2}}$, (3) $\ln b+a>\ln a+b$, (4)若 $m>0$, 则 $\frac{a}{b} < \frac{a+m}{b+m}$
$\text{A.}$ (1)(2)
$\text{B.}$ (1)(3)
$\text{C.}$ (1) 4
$\text{D.}$ (2)(4)