B. Decreasing vehicle traffic and industrial emmisons. As NASA explains, “Ground-level, ’bad,’ ozone forms when nitrogen oxide gases from vehicles and industrial emissions react with volatile organic compounds
The best answer is Communication. With a great communication of each member of the group, the members will cooperate accordingly to their function and could build a great teamwork and could prolonged their survival.
(here is my suggestion) all i know is most of the hydrogen and helium in the Universe were created in the moments after the Big Bang. Heavier elements came later.