In the Centerville Botanical Gardens, all tulip trees are older than any maples. A majority, but not all, of the garden' s sycamores are older than any of its maples. All the garden' s maples are older than any of its dogwoods. If the statements above are true, which one of the following must also be true of trees in the Centerville Botanical Gardens? ['Some tulip trees are not as old as the oldest sycamores.', 'Some dogwoods are as old as the youngest sycamores.', 'Some sycamores are not as old as the oldest dogwoods.', 'Some sycamores are not as old as the youngest tulip trees.']