Match the humidities with their description.

1. Reading with the most water in the air.
2. Reading with 80% water in the air.
3. Reading that shows the air could hold 80% more water.
4. Reading with the lowest amount of water in the air.
a. Humidity of 20%
b. Humidity of 10%
c. Humidity of 90%
d. Humidity of 80%