Final answer:
Trade was difficult during Washington's first term as president due to the limited availability of products to trade.
Step-by-step explanation:
The best option that describes why trade was difficult during Washington's first term as president was that there were few products to trade. This was primarily due to the limited industrial and agricultural output of the United States at that time. The country was still in its early stages of development and did not have a diverse range of goods to export to other nations.
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