Đạo hàm của hàm số y = (3^x - 1)/5^x là:

A. $y^{\text{'}}={\left(\frac{3}{5}\right)}^x\ln \frac{3}{5}+{\left(\frac{1}{5}\right)}^x\ln 5$

B. $y^{\text{'}}=x{\left(\frac{3}{5}\right)}^{x-1}-x{\left(\frac{1}{5}\right)}^{x-1}$

C. $y^{\text{'}}={\left(\frac{3}{5}\right)}^x\ln \frac{3}{5}-{\left(\frac{1}{5}\right)}^x\ln 5$

D. $y^{\text{'}}=x{\left(\frac{3}{5}\right)}^{x-1}+x{\left(\frac{1}{5}\right)}^{x-1}$