Final answer:
Malaria has not been eradicated due to multiple factors. Lack of effective treatments, evolutionary advantage, and evolutionary trade-offs contribute to the persistence of the disease. OPTION C IS ANSWER
Step-by-step explanation:
Malaria has not been eradicated because of several reasons. Lack of effective treatments (Option A) is one of the factors contributing to the persistence of malaria. The disease is caused by a mosquito-borne parasite called Plasmodium, and over time, the parasite has evolved resistance to commonly used malaria treatments. This makes it difficult to completely eliminate the disease.
Additionally, malaria may provide an evolutionary advantage (Option B) in certain environments. In areas where malaria is prevalent, individuals with genetic variations that provide some level of immunity to the disease have a better chance of survival and reproduction. These genetic variations can be passed on to future generations, making the population more resistant to malaria.
Evolutionary trade-offs (Option C) can also play a role in the persistence of malaria. For example, in some cases, genetic mutations that confer resistance to malaria may also have negative effects on an individual's health. OPTION C IS ANSWER