What could cause an outbreak of malaria in a country ...

What could cause an outbreak of malaria in a country after it had been eliminated?

1 mosquitoes become resistant to insecticides
2 migration of population due to war
3 malarial parasites become resistant to quinine (the medicine for malaria)

A. 1, 2 and 3

B. 1 and 3 only

C. 2 and 3 only

D. 1 and 2 only

Select your answer:

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