Now, compare the odor thresholds of guaiacol, eugenol, and vanillin. Because these substances have slightly...

Now, compare the odor thresholds of guaiacol, eugenol, and vanillin. Because these substances have slightly different chemical structures, they also have different odor thresholds.
guaiacol
odor threshold:
3 ppb in water
vanillin
odor threshold:
200 ppb in water
eugenol
odor threshold:
30 ppb in water
Imagine a person smells three glasses of water: one containing guaiacol, one containing eugenol, and one containing vanillin. In each glass, the flavorant is at a concentration of 75 ppb.
Based on their odor thresholds, which flavorants would the person likely be able to detect? Select all that apply.
guaiacol
vanillin
eugenol