A solid is a state of mater, which is stable can can not change physical shape unless something changes it (erosion,etc)
In <span><em>Hills Like White Elephants</em>, a couple is discussing on whether they should terminate the woman's pregnancy, which she is willing to do if it will make him happy, but he won't want her to go through it if she doesn't want to. As they wait for this <em>trip</em>, which seems to be to take them to the place where the procedure would be performed, they go back an forth on said decision.
Therefore, your best answer would be option A.</span>
Please show us the list you're referring to.