Answer:
It made navigation much, MUCH easier.
Explanation:
Normally, people relied on staying close to the shore to avoid getting lost. Only the bold would go out farther. But with the invention of the magnetic compass- you could go much further as you had a sense of direction. You could still get lost, but you could likely find your way back.
Expand its power and control over Eastern Europe
Answer:
D. Buying them.
Explanation:
The Trans-Atlantic Slave Trade flourished between 1450 and the end of the 19th century. European traders - Portuguese, Spanish, French, English, Dutch - arrived in their ships and bought local men, women and children. They could also organized campaigns to hunt for slaves in the area, or bought people from local merchants and rulers. The local kings or lords in West Africa were actively involved in selling his own people as slaves for the large profitability of it.