A. 0

B. 1

C. 5

D. 6

A.  $y=\ln x$ 

B.  $y=e^{-x}$ 

C.  $y={\left(\frac{1}{3}\right)}^x$   

D.  $y={\log }_{\frac{1}{3}}x$

A.  $y={\left(\frac{2}{3}\right)}^x$

B.  $y={\left(\sqrt{2}\right)}^x$

C.  $y={\left(\frac{1}{2}\right)}^x$

D.  $y={\left(\frac{e}{\mathrm{\pi }}\right)}^x$

A. $y={\left(\frac{2}{3}\right)}^x$ 

B.  $y={\left(\sqrt{2}\right)}^x$

C. $y={\left(\frac{1}{2}\right)}^x$ 

D. $y={\left(\frac{e}{\pi }\right)}^x$ 

$A. y = {\left(\frac{e}{\mathrm{\pi }}\right)}^x$

$B. y = {\left(\sqrt{2}\right)}^x$

$C. y = {\left(0,5\right)}^x$

$D. y = {\left(\frac{2}{3}\right)}^x$