Which of the following calculations can be used to determine the concentration of a sample if the absorbance of the sample is measured using spectrophotometry?
A. A = log(I/Iâ‚€)
B. A = log(Iâ‚€/I)
C. A = log(I/Iâ‚€) / c
D. A = log(Iâ‚€/I) / c