Normal and inferior goodsMaria likes going to the ball park to watch baseball, and she also is fond of going to the theater to listen to the symphony orchestra. The following diagram shows to a Maria's indifference curves for going to ball, games and symphonies. With Maria's initial budget constraint (BC1), she chose to go to for symphonies in for baseball games per month (point x). Then her budget constraint shifted to BC2, and she chose to go to five symphonies in five ball games per month (point y)

10 8 BALLGAMES N BC BC, 4 5 8 10 SYMPHONIES Of the following choices, which could have shifted Maria's budget constraint from BC, to BC2? Check all that apply. Her income decreased while the prices of baseball and symphony tickets stayed the same. The price of symphony tickets increased while her income and the price of baseball tickets stayed the same. The prices of both baseball and symphony tickets decreased while her income stayed the same. Her income increased while the prices of baseball and symphony tickets stayed the same. Based on Maria's consumption of ballgames and symphonies after her budget constraint shifted, ballgames are goods and symphonies are goods