To identify the set with the stronger interaction between the electrically charged objects, the most relevant question among the provided options is:
"Are the objects both positively charged or both negatively charged?"
This question addresses the nature of the interactions based on the type of charge. Like charges repel each other, while opposite charges attract. The interactions are affected by the type of charge each object carries (either +1 Coulomb or -1 Coulomb); knowing if they are the same or opposite will directly influence the strength of the interaction according to Coulomb's law.