CO would be Carbon Monoxide
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Answer:
Spices from Asia, new knowledge, wealth, fame and adventure
Explanation:
Europeans were interested in spices from Asia, but Muslims and Italians controlled the trade routes from Europe to Asia. Nations wanted riches and new lands for themselves.
The answer is b and it is shown by What they said
We breathe our carbon dioxide, so do plants. Animals and plants get rid of carbon dioxide gas through a process called respiration.