After answering a summons and complaint, Mike received a set of written questions from the plaintiff's attorney. He was directed to respond to the questions in writing under oath. This discovery technique is called?

interrogatories

Explanation:

Based on the scenario being described within the question it can be said that this discovery technique is known as interrogatories. In the context of law, interrogatories are a set of written question that have been formally created and are used in order to help determine which facts regarding the case will be presented and used in the upcoming trial.

first, the romans stayed isolated because they had to defend their own territories from neighboring cities that were harassing them, like the etruscans. second, once the romans managed to defeat their neighbors, and started to expand their territory, they started to build roads and bridges. finally, now that the romans have covered their territory with roads functioning as highways, they could mobilize their legions faster to assemble larger military units in a specific place