how is transportation stander rights under the qin? A roach were the same wet. B carriages were the same height. See everyone paid the same tax. D axles of carriages were the same length.

To determine how transportation standard rights were understood under the Qin dynasty, we can analyze the given options and eliminate incorrect answers.

A. "A roach were the same wet."
This answer is not grammatically correct and does not make sense in the context of transportation rights under the Qin dynasty. Thus, we can eliminate option A.

B. "Carriages were the same height."
This option suggests that all carriages were of equal height. While uniformity in carriage construction might have been a factor, it does not directly relate to transportation standard rights. Therefore, we can eliminate option B.

C. "See everyone paid the same tax."
This option implies that transportation standard rights were associated with the payment of equal taxes. While taxation might have been a factor in relation to transportation rights, it is not specific to the Qin dynasty. Therefore, we cannot definitively conclude that option C is correct based solely on the given information.

D. "Axles of carriages were the same length."
This option suggests that the length of axles on carriages was standardized. The standardization of axle length could contribute to transportation standard rights by ensuring uniformity and compatibility among carriages. So, option D is the most likely answer.

In summary, among the given options, option D ("Axles of carriages were the same length") is the closest to describing transportation standard rights under the Qin dynasty. However, without additional information, we cannot conclusively determine the accurate representation of transportation rights during that time.