<span>It was 20 years between Muhammad's first revelation and when he conquered Mecca. The correct answer is C. His first revelation happened in 610 AD and he conquered Mecca 20 years later, in 630 AD. This first revelation refers to when the archangel Gabriel first appeared to Muhammad. And he defeated the Meccans in 630, taking control of their city, but he was quite generous towards them.</span>
Explanation:
A. It was a time of cultural changes
Slave labour was restricted largely to domestic service. Rural wage rates were depressed owing to the caste system and the “village community” mechanism. In the city, the monopoly of resources by the ruling class necessarily depressed wages through the market mechanism itself.
Answer:
Space exploration led to advances in many fields. Some include the telecommunications, micro-technology, computer science and the solar power. It started the efforts of lauching space devices and competitive countries were able to send space probes to places like the moon and even Venus.
