Which of these events deserve to be called watershed events in american history? because?

1) the invention of basketball in 1896.
2) the discovery of penicillin in 1928
3) the election of barack obama to the presidency in 2008.
4) prohibition of alcohol in the 1920s.
5) brown v. the board of education supreme court case.
6) the invention of the cell phone.
7) the battle of the alamo.
8) rap music.

Read the scenario. samira is a freshman basketball player who hopes to go to college on a basketball scholarship. she is offered the chance to play on her school’s varsity basketball team, which plays in tournaments during holiday breaks. samira usually spends her breaks working at the local hardware store. after careful consideration, samira decides to stay on the freshman basketball team and keep working over breaks.the fact that samira may miss out on a scholarship opportunity by staying on the freshman team illustrates-a cause.-minor consequences.-a trade off.-unexpected risk.