Answer:
C. the population of Columbia
Step-by-step explanation:
"Colombian eradication program" is also known as "Coca eradication." It is meant to fight the production of drugs by eliminating coca cultivation, since coca is also used to make cocaine (a strong stimulant and recreation drug).
If production will be limited or come to a halt, this will unlikely cause a decrease in the population of Columbia. Cultivation of coca is not related to the population of people in the country nor the reproduction of people.
So, this explains the answer.