The author of the passage implies which of the following about the political importance of the type of urban water management system described in the passage? A. Because the system was centralized, it allowed political control over a widely scattered population. B. The knowledge required to design and maintain the system became the pretext for Maya elites' political authority. C. By selectively limiting access to water, Maya elites used the system to curb challenges to their authority D. The system is not sufficient to explain the sources of centralized political power in all parts of the Maya region E. The system's continued maintenance required political authorities to exert control over an increasing proportion of economic resources.