Answer:
Neither option A nor B accurately describes how Robert Gray supported the eventual development of Chinook Jargon.
Robert Gray was an American sea captain who is credited with being the first non-indigenous person to explore and chart the mouth of the Columbia River, located in what is now the Pacific Northwest region of the United States.
It is believed that Gray and his crew had early contact with the Chinook people, who spoke a variety of indigenous languages in the region. Through this contact, Gray and his crew likely began to learn and use words from the Chinook language, which eventually contributed to the development of Chinook Jargon, a simplified trade language that emerged in the Pacific Northwest in the 19th century.
Therefore, the correct answer is that Robert Gray likely supported the eventual development of Chinook Jargon through his early contact with the Chinook people and his use of their language.