One of the problems facing scientists in reconstructing the atmospheric composition in the history of earth geology is the lack of available samples. In recent years, many people have paid attention to amber. They believe that compared with other organic materials, amber has been preserved in a long geological age. Chemical and isotopic information hardly changes, so it can be used to reveal the composition of the global atmosphere at different times. Which of the following, if true, would most challenge the above conclusions? ['Because the form of living things is often kept inside amber, it can reflect the relationship between the ecological environment and living things at that time.', 'Amber was mainly born in the Eocene century, about 40 to 60 million years ago. Amber was not formed in other years.', 'Amber is formed from the resin of the conifer family by pressure and heat. Due to the long time, it is very small.', 'The hardness of amber is low. If it is damaged due to improper handling and storage, it will affect the accuracy of isotope detection.']