In the seafloor strata of the Yellow Sea and East Sea in China, there are abundant oil resources, which were generated from the remains of a large number of land plants in ancient times. This shows that in the ancient times, the continental shelf of the Yellow Sea and the East China Sea was a large plain with dense vegetation. Which of the following can support the above conclusion? ["The continental shelf will continue to change slowly but never stop as the earth's crust moves.", 'Rivers that flow endlessly are like conveyor belts, which continuously transport organic matter on land to the sea.', 'The Gulf region of the Middle East is mostly a vast desert with abundant oil resources underground.', 'Generally speaking, mountainous areas at similar latitudes on land are richer in vegetation than plain areas.']