Which of the Following Statements About Our Knowledge of the Mesoamerican

Which of the following statements about our knowledge of the Mesoamerican ball game is incorrect?

A) there are likely three main forms of the game with an unknown number of variants
B) absolutely nothing is known about the rules of the game or how it was actually played
C) most balls were made from the latex sap of the lowland Castilla elastica tree
D) ball courts vary considerably in shape and size, but are typically "I"-shaped