I would say C is the most correct.
In D it depends on what water source you're using. Let's say it is a waterfall, then the source of the water (melting ice or a lake) may disappear in the future.
If you're using underwater "windmills" placed in the ocean, then you would expect it to last a while as the ocean will not disappear in the near future.
Answer:
cold
Warm air lifted over a moving cold air mass will produce a _____ front.
Answer:
Gastric Acid?
Explanation:
Acid seems like it would have more ph
