I need an answer for this ASAP!!

Researchers randomly divide participants into groups. each group takes a different amount of omega-3 fatty acid supplements daily for a month. one group receives a placebo. the researchers measure the impact on cholesterol levels in the blood. what is the purpose of random assignment in this experiment? a, to produce treatment groups with similar characteristics b, to ensure that all people with high cholesterol have an equal chance of being selected for the study c, to increase the accuracy of the research results and prevent skewness in the data

Which process can increase the rate of greenhouse gas emissions into the atmosphere in response to a decrease in albedo

Aboy jumps into a cold swimming pool and his body tempature goes down hus muscles ,blood vessels