It helped them transport things easier i think
The Answer is D) logs. A Corduroy road is also known as a log road or timber trackway made by placing logs, perpendicular to the direction of the road over a low or swampy area.
A dynasty is when one family rules a country or region over a long period of time. Generally, the head of the family will be the ruler of the land, like an emperor or king. When that ruler dies, another member of the family will take power, usually the oldest son.
hope this helps （╹◡╹）
Some of the key words that make the contrast obvious is "on the other hand," "while," "however," and "difference between."
