Fact 1: Immunity results from immunization.

Fact 2: Oxygen deprivation in immune cells causes immune weaknesses.

Given the two facts above, answer the question "Oxygen deprivation in cells result in what?" with the following options: 
- weakness
 - strength
 - Dehydration
 - anemia
 - oxygen
 - water
 - Damages them
 - Pollution


 

 weakness        