In the Case in Point Titled "Take Me Out to the Ball

In the Case in Point titled "Take Me Out to the Ball Game . . .", the fan price index used to track the costs of going to baseball games uses:

A) a fixed market basket of goods and services, like the consumer price index.
B) a varying market basket of goods and services, like the consumer price index.
C) a varying market basket of goods and services, like the implicit price deflator.
D) a fixed market basket of goods and services, like the implicit price deflator.