Answer:
B) The amount of vitamin D gained in 1 day.
Explanation:
Carbon-14 and Uranium-238 have something we call a half live, which is basically a known time period for it to change half of its C-14 or U-238 radioactively decay. Since we know how long that is 5730 years for Carbon-14 for half a sample to deteriorate, than we can figure out how old it is.
Lemonade mix and water
Solvent: Water
Solute: Lemonade mix