The correct answer is D) All of the above. On the Inland Rules of the Road, which apply to vessels operating on the Western Rivers, a power-driven vessel must keep out of the way of a sail vessel, regardless of whether the sail vessel is ascending or descending the river. Additionally, a power-driven vessel must also keep out of the way of another power-driven vessel that is ascending the river. This is the general rule of "upstream traffic has the right-of-way" on the Inland Rules. The other options (A, B, and C) are incorrect because they only specify keeping out of the way of certain vessels, rather than all the vessels as required by the Inland Rules.