In the same way no one cares for chemotherapy, no one cards for DDT. In most of North America and Europe, where malaria has largely been eradicated, we fail to understand the complete situation. The world knows there is one choice; we must prevent malaria. DDT is a risky treatment. How does the reference to chemotherapy as a treatment for cancer relate to a main idea in the blog post?

a. It reinforces the idea that prevention is crucial for dealing with serious diseases.
b. It emphasizes the idea that potentially harmful actions may be required to combat serious diseases.
c. It reinforces the idea that there are multiple approaches to fighting the spread of serious diseases.
d. It emphasizes the challenges of reducing the number of cases of serious diseases.