Sue Has Twin Baby Boys and Is Trying to Decide

Sue has twin baby boys and is trying to decide whether or not to have them vaccinated against chickenpox or to take them to a "chickenpox party" where they can be naturally exposed to other children who currently have chickenpox.Which of the following would NOT be a relevant question for Sue to research before making her decision?

A) Are there any scientific studies of observable and quantifiable claims regarding the chickenpox vaccine and/or chickenpox 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,minimization of bias,and have the results been reproducible?
D) Are there lots of parents on the Internet endorsing the chickenpox parties?