Final answer:
Based on proven reserve estimates, the use of oil will likely end before coal due to its limited availability. However, external factors such as environmental policies and the growth of renewable energy could significantly alter the timeline for ending the use of fossil fuels.
Step-by-step explanation:
If the goals from this proposal are met, it depends on which scenario unfolds regarding the usage of fossil fuels like coal and oil. According to the given information, the known reserves of oil are estimated to run out in about 60 years, while coal is much more abundant and challenging to extract. This suggests that based on simple extrapolation, without intervention, the use of oil will end before the use of coal. However, if we consider environmental factors, policy changes, and the rise of renewable energy sources, this could alter the equation significantly.
An essential consideration is the climate activism pressure to switch from fossil fuels to renewable energy to prevent further global warming. Political actions could enforce financial disincentives on fossil fuel usage, encouraging a shift to alternative energy sources. Moreover, with the continuous development of renewable energy sources like solar and wind, market forces might naturally move us away from fossil fuels before they run out.
Ultimately, without knowing the specific goals of the proposal mentioned, the answer could potentially be 'b. The use of coal will end before the use of oil', considering the relative abundance of coal and its longer expected lifespan as a resource. However, external factors like legislation and market preferences for renewables could dramatically alter this outcome.