Answer: driving on the highway
It is the practice of driving in the highway that can be considered as an indicator of finally accepting social contract. Social contract refers to the agreement wherein individuals in all parties agreed to have a natural transfer of right.
The correct answer to this open question is the following.
Since the beginning of the Islamic era in 622, the diffusion of Muslim advancement in science, technology, or mathematics spread basically through trade and conquest. As Muslims conquered territories, they established trade routes and spread the Muslim's teachings to the conquered regions, although they allowed people to have their own belief systems.
So since medial times, Muslims shared their knowledge and inventions in the fields of astronomy, mathematics, algebra, cartography, geography, cosmology, alchemy, astronomy, opthalmology, chemistry, botany, agronomy, medicine, pharmacology, and the development of trade in the harsh conditions of the desert.
The Russian word for Caesar is Цезарь.
B. The ottomans promoted free trade on the silk road
Scientific Revolution and Enlightenment