He determined that the laws of physics are the same for all non-accelerating observers, and that the speed of light in a vacuum was independent of the motion of all observers.
An expansion of credit and speculation.
Bedouin were an Arab camel nomadic people. Since they were nomadic, it meant that they would be scattered away from each other. several families however related to one founder often founded a clan. The ties were important for mutual benefits such as security, which was paramount, as the people lived in increasingly hostile environment. In addition,clan systems provided a base for social support for the elderly as the younger generation participated in trade.
I believe the answer would be C. Hope this helps!
O worked, showed should be correct