已知某物质的摩尔吸光系数varepsilon为2.5 times 10^4 , (L) cdot (mol)^-1 cdot (cm)^-1，用1 (cm)比色皿测得该物质溶液的吸光度A=0.50，则该溶液的浓度((mol/L))为？----( )A. 5.0 times 10^-4 , (mol/L)B. 2.0 times 10^-5 , (mol/L)C. 2.0 times 10^-5 , (mol/L)D. 1.25 times 10^4 , (mol/L)

已知某物质的摩尔吸光系数$\varepsilon$为$2.5 \times 10^4 \, \text{L} \cdot \text{mol}^{-1} \cdot \text{cm}^{-1}$，用$1 \text{cm}$比色皿测得该物质溶液的吸光度$A=0.50$，则该溶液的浓度$(\text{mol/L})$为？----( )

A. $5.0 \times 10^{-4} \, \text{mol/L}$

B. $2.0 \times 10^{-5} \, \text{mol/L}$

C. $2.0 \times 10^{-5} \, \text{mol/L}$

D. $1.25 \times 10^4 \, \text{mol/L}$