It should be A, the new idea was supported by experimental evidence since Galileo conducted the free fall experiment about 400 years ago, resulting in steel balls of different mass landing at the same time, overriding Aristotle’s theory that “heavier steel ball falls first”.
In this case W is negative, the heat input is less than in the constant volume case, and CP is less than CV. If the ice melts it is as if it were being compressed because its volume is reduced.
<h2>MyHeritage</h2>
The kinetic energy before equals K after