Final answer:
A solvent that does not cause any compounds to move from the original spot is not polar enough. Option c.
Step-by-step explanation:
A solvent that does not cause any compounds to move from the original spot is not Polar enough.
Eluting refers to the process of separating compounds in a mixture based on their affinity for a mobile phase.
Evaporating refers to the process of a liquid turning into a gas. Volatile refers to substances that easily vaporize at room temperature.
In this context, a solvent that is not polar enough means that it cannot effectively dissolve or interact with the compounds in the mixture, leading to no movement from the original spot. Option c.