Based on historical records, the Maya civilization reached its classic phase between 250 and 900 C.E. and survived with economic and political vigor until about 800 to 900 CE.
During the classical phase of Maya Civilization, the population of Maya increased to millions, with various cities springing up in the Maya territory.
Also, during this period, the Maya trade also expanded with many monuments' infrastructure constructed.
However, by 800 to 900 CE, the classical phase of the Maya Civilization collapsed. This period is often referred to as Terminal phase.
Hence, in this case, it is concluded that the correct answer is 800 to 900 CE.
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