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According to the lesson, which of the following is considered to be the first video game?

Select one:

a$.$ Space Invaders $-$ a fixed shooter game in which the player controls a laser cannon by moving it horizontally across the bottom of the screen and firing at descending aliens.

b$.$ Spacewar! $--$ a game developed at the Massachusetts Institute of Technology $($MIT$)$ that spread to other college campuses and computing centers.

c$.$ Pong $-$ an electronic table$-$tennis simulation game.

d$.$ Tennis for Two $-$ a game developed at Brookhaven National Laboratory as a way to entertain people coming through the laboratory on tours.