H. using a pulley system can reduce the load force, over a greater distance.<span />
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.
Yes that’s correct it is B
Water would not expand when it freezes.<span> </span>
