Step 1: Break down the Latin phrase.
"Nemo Dat" means "no one gives", "Quod Non Habet" means "what he does not have". Put together it reads as a rule about transferring property.
Step 2: Apply it to sale of goods.
A seller who does not own goods, or owns them with a defect in title, cannot pass better title to the buyer than what he himself holds.
Step 3: Match with the options given.
This rules out the maxims about judges, taking others' property, or habits, since none of those describe transfer of ownership.
\[ \boxed{\text{No one can give what they do not have}} \]