Answer:
a) gene editing
b) gene introduction
c) gene silencing
Explanation:
1. In this scenario, the disease is being caused by a problem at a singular point of the DNA. By changing this one point through gene editing, all of the white blood cells will be corrected and start working correctly.
2. Since not enough protein is not being produced because of the lack of a specific DNA code to produce more, this can be resolved by adding in the code to produce the protein through gene introduction.
3. The gene that causes production of a problematic protein can be silenced to prevent it from being translated again, therefore stopping the protein from being produced.