Entertainment Software Association Would Like to Test If the Average

Entertainment Software Association would like to test if the average age of "gamers" (those that routinely play video games) is more than 30 years old. A Type II error would occur if Entertainment Software Association concludes that the average age of gamers is

A) is not equal to 30 years when, in reality, the average age is equal to 30 years.
B) is equal to 30 years when, in reality, the average age is not equal to 30 years.
C) 30 years or less when, in reality, the average age is more than 30 years.
D) greater than 30 years when, in reality, the average age is 30 years or less.