Design an experiment using UV-Vis spectroscopy to determine the concentration of a conjugated dye in a solution.

• A. Prepare a series of standard solutions, measure their absorbance, and create a calibration curve to determine the unknown concentration.
• B. Determine the core electron binding energies using x-ray spectroscopy.
• C. Use infrared spectroscopy to measure the vibrational frequencies of the dye.
• D. Measure the nuclear spin transitions using NMR spectroscopy.

Answer: (A)