Final answer:
A plant cell in a hypertonic solution loses water, causing the cell membrane to shrink and detach from the cell wall, in a process known as plasmolysis.
Step-by-step explanation:
When a plant cell is placed in a solution that has a higher salt concentration, this solution is known as a hypertonic solution. The cell will lose water due to osmosis, as water moves from areas of lower solute concentration (the cell's interior) to areas of higher solute concentration (the surrounding solution). The result is that the cell membrane shrinks and detaches from the cell wall in a process called plasmolysis. Therefore, the correct answer for what occurs to the plant cell is A) Cell shrinks.