Answer:
C. Primary or Secondary sources related to the event.
Explanation:
A historian using primary or secondary resources related to the events is the most reliable.
The correct answer is All of the Above
Explanation: International trade is an exchange of goods and services between people or companies from different countries. How countries can sell their products to their territory (export) or can use products from other countries (import).
The correct answer is: [A]: "nomadic" .
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Answer:
desert and sand that slowed wagons to crawl
