The helium gas currently used by humans mainly comes from the by-products produced during the oil and gas drilling process. The total amount is limited and it is difficult to meet the demand. The first "intentional" discovery of a large amount of helium is the result of a recent collaboration between researchers and mining companies. Approximately 1.5 billion cubic meters of helium has been found in Tanzania, in eastern Africa, and a total of 1.2 million medical nuclear magnetic resonance devices can be used. This site is located in the Great Rift Valley of East Africa. The heat generated by violent volcanic activity has contained ancient rocks. Of helium is released into shallow oilfields. This extraction may become a turning point to ensure future social helium demand. Which of the following needs to be premised for the conclusion of the above conclusion? ['Foreseeable future without violent volcanic activity.', 'The geomorphology of the Great Rift Valley in East Africa no longer changes in the long run.', 'The detection method used this time helps to find and extract more helium in more places.', 'In the future, humans will no longer wait passively for by-products from oil and gas drilling.']