The colonies at Jamestown and Plymouth were sponsored by the London Company and the Mayflower Compact, respectively.
Jamestown, established in 1607, was funded by the London Company (also known as the Virginia Company of London).
Plymouth, established in 1620, was associated with the Pilgrims who created the Mayflower Compact as a governing document for their colony, but they were sponsored by a group that included investors and the Virginia Company (not directly named in your options).
So, to clarify based on your options, the correct answer for Jamestown is the London Company. The Mayflower Compact, while important for Plymouth, was not a sponsorship entity but rather a social contract created by the settlers.