Final answer:
The inference that there will probably be the same amount of water on Earth in the future is due to the conservation of water through the global water cycle. However, the distribution of freshwater is a challenge, with less than 1% being easily accessible for human use among all the water on the planet.
Step-by-step explanation:
If there is the same amount of water on Earth now as there was in the past, one can infer that B) There will probably be the same amount of water on the planet many, many, many years from now.
This is because the global water cycle is a closed system where water is neither created nor destroyed; it merely changes states and locations. The total amount of water on Earth has remained relatively constant over geologic time.
Despite the constancy in the quantity of water, less than 1 percent of fresh water is easily accessible to living things. With over 97 percent of the Earth's water being saltwater in the oceans, and a significant portion of freshwater locked in glaciers or underground, there is a scarcity of water that can be used for drinking and agriculture.
Moreover, factors such as climate change and human activity are affecting the distribution and quality of fresh water resources. This underscores the significance of water conservation and the challenges faced by populations worldwide due to water scarcity.