Test analysis: This question comes from history. The material says, "Every day, there is no watershed, Pucheng is a small pass, and Wu Yue is like running water." Its trip to the ocean is especially difficult to count. "It involves water transportation, but it fails to reflect development. Its intention is to reflect the circulation of goods, so it excludes a; To become a national economic and trade center, there must be a nationwide horizontal comparison, and the materials are obviously not available, so C is excluded; To reflect the budding of capitalism, there must be an employment relationship, and the materials are obviously not reflected, so choose B.