Researchers want to know how communities respond to various disasters in the community. What type of data collection would they use? a. Sample survey
b. Experiment
c. Observational study
d. Case study

Which statement best describes the role of the artificial heart? the artificial heart is a good replacement option for individuals who do not want a human heart. the artificial heart has been a great option because it can keep patients alive for a very long time. the artificial heart is not a good option because of the high possibility for rejection. the artificial heart has limited usefulness but can prolong life or be a tool to use while waiting for a transplant.