What is a reason for the eradication of malaria in Europe owing a debt to systematics?

What is a reason for the eradication of malaria in Europe owing a debt to systematics?
 
  a. Systematists developed insecticides to fight malaria.
  b. Systematists re-categorized mosquitoes into six species.
  c. Systematists discovered that mosquitoes breed in standing water.
  d. Systematists cloned the genes for malaria
  e. Systematists developed new insecticides.

Question 2

The classification of species often leads to
 
  a. understanding evolutionary relationships that directly and positively influence human
  health.
  b. new phylums.
  c. a list of names with no significance to biological function.
  d. new evolutionary theories.
  e. a decrease in the actual number of species that exist.