I want say data because they got data about the disease they have.
Experiment mean- they test you on stuff.
i think its b because they are humans and human are population
The correct word that fills in the blank in the previous sentence is b) population. In statistical terms, a population refers to the entire group of individuals that the researcher wants to study or make inferences about. In this case, it would be the set of all children in the world with the disease. The researcher is interested in examining the red blood cell count in every child with the disease, which represents the population for this study.
