Why is replication important to science?

a. it allows you to obtain a representative sample of cases to study.
b. the natural setting eliminates the artificial environment of a lab.
c. researchers can test the impact of belief on behavior.
d. minimizing preexisting differences between groups increases confidence in findings about a specific theory.
e. repeated research with similar results increases confidence in the reliability of the original findings.

Aresearcher conducts a focus group to learn about attitudes towards hygiene and disease prevention. two weeks after the focus group, the researcher learns one of the subjects had a heart attack at home and was hospitalized, but made a full recovery. based on dhs regulations, the researcher report this event to the irb? no, this does not need to be reported since the subject had the heart attack when they were home, not at the focus group.no, this does not need to be reported since it is unrelated to participation in the study.no, this does not need to be reported because two weeks have passed.no, this does not need to be reported since the subject recovered.

2) based on the information, which is an opinion rather than a fact about immigrants to north america? immigrants

According to the aztec history, how did the aztecs know where to build their new city of tenochtitlan? why was this a good location?