Astronauts on the International Space Station commonly face a health issue that some people on Earth experience as well . Research conducted on this health issue has helped solve problems on Earth . what is this Health issue?

A - Weightlessness
B - Obesity
C - Hearing and sight loss
D - Loss of bone and Muscle density​

What is the best way to use the clean water act to address the issue of dirty water and diseases that plague asmall community? a) to report the number of cases of people who havecholera symptomsb) to provide health guidelines about effects from waterborne diseases c) to enforce standards that focus on chemical dischargeinto bodies of waterd) to carry out research that investigates how dirty wateraffects human health