Based on the text provided, the best answer to the question regarding Locke's principle related to the natural right to property and the establishment of a common market is:
"It gave people the right to engage in producing, selling, and buying products."
This response reflects the essence of Locke's principle concerning individual rights and property, as well as aligns with the text's mention of protections around private property and the freedoms essential to a market economy, including the ability to engage freely in business activities among states.