Statements C and D are correct.
In America, the development of canals helped lead to the increase in population for several towns/cities that were very seldom settled before. A perfect example of this would be the development of the Erie Canal in New York. Thanks to the Erie Canal, several cities population grew immensely during this time (like Utica, Rochester, and Albany).
Along with this, connecting canals with other waterways made for convenient way of shipping goods and materials. This reduced the cost of shipping goods, making for lower prices for American consumers.
Meh corbictbi xek kopem 3cce kepek, idk what that means
I think the answer is "D" Shey's Rebellion
50 years is a long time but not long enough for the preconquest Aztec to forget their way of living before the Spanish came. The compromise lies in how easy it is to get historical information from the Aztec since some of them will have already learned Spanish very well and between how accurate these historical accounts are since little details about the preconquest Aztec society can be forgotten in 50 years.