In Regard to Ulama, Which of the Following Is True

In regard to ulama, which of the following is true?

A) the game must have been very fast because of the composition of the ball.
B) may have been the precursor to the modern game of jai alai which is very popular in Mexico and Central America today.
C) when Columbus sailed to the Americas, he watched a ball game that was being played on an island . in the Caribbean that utilized a rubber ball.
D) when Columbus sailed back to Spain, he returned with a rubber ball which nobody in Europe had ever seen before.
E) All of the above.