Which of the following would help prevent a local disease outbreak from becoming a pandemic? A.
Populations in neighboring regions have been vaccinated against the disease.
B.
People travel frequently between the infected region and neighboring regions.
C.
The infected population and populations in neighboring regions are socially and economically similar.
D.
Populations in neighboring regions have never been exposed to the disease.

A or D

Explanation:

If this is after the disease was founded then it should be A, but if it was before then it's D.

my questions are always answered on spot you know whats the

you gotta always put the reward points high. if you r question takes long to answer and the reward points is just 5, then almost nobody will likely want to answer your question.

also, if your question is unclear, lacks information, nobody gonna answer.

people prefer multiple choice the best, its easy and quick when multiple choices questions. if you have long sentence questions on stories, essay, etc., then you have to at least give them as much points as possible.

it kinda like bounty , the question with most reward prize and the easiest to pull off will get

hope this

just saying your question will get reported and deleted an my answer too

answer: i would say the brain but it seem that you have a brain.