Sue Has Twin Baby Boys and Is Trying to Decide

Multiple Choice

Sue has twin baby boys and is trying to decide whether to have them vaccinated against chicken pox or to take them to a "chicken pox party" where they can be naturally exposed to other children who currently have chicken pox.Which of the following would be the first relevant question for Sue to research before making her decision?

A) Are there any peer-reviewed, scientific studies of observable and quantifiable claims regarding the chicken pox vaccine or chicken pox parties?
B) Do any relevant studies make testable and falsifiable predictions related to a clearly stated hypothesis?
C) Are the relevant studies well designed and described with large sample sizes and minimization of bias, and have the results been reproducible?
D) Are there a lot of parents on the Internet endorsing the chicken pox parties?