I think B. Provide a decent income
The first Europeans to arrive in North America -- at least the first for whom there is solid evidence -- were Norse, traveling west from Greenland, where Erik the Red had founded a settlement around the year 985.
Explanation:
It occurs when people are charged DIFFERENT prices for the SAME products
Answer:Towards china
Explanation:Kublai khan took over yuan dynasty
Interacting groups shared skills and ideas that improved farming practices