Scientists have been studying threats to coral reefs. some reefs around the southeast shore of australia have experienced increased threats while others in the northwest shore of australia have seen a decrease in threat. explain the most effective way that scientists could use this information to design a new study aimed at developing reef protections. (3 points)

scientists could compare environmental conditions in the threatened australian reefs with other reefs near florida, since there would be little overlap in their characteristics.

scientists could compare environmental conditions in the two sets of australian reefs, because those reefs are more likely to be similar in many ways. this will highlight the difference that is causing the threat.

scientists could compare environmental conditions in two sets of reefs in florida and apply that data to the reefs in australia.

scientists could compare environmental conditions in reefs randomly selected from around the world to get the most variable set of conditions possible and to make good comparisons.