! I use the Gloria Jeans one , and now I only have to pay $ 3.30 for my regular cup ( which is about 400ml ) . I also have the frequent customers card , so when I drink 10 cups of coffee , I will get one free , which makes my coffee $ 3.00 each time ! ! The priviledge of committing myself faithfully to one coffee provider is huge ... !

Based on the preceding passage, choose your answer for question Why does the writer use the frequent customers card ?

a). To get coffee for $ 3.30.
b). None of the above choices ..
c). To be able to buy 400ml cups of coffee.
d). To be able to drink 10 cups of coffee.
The answer is:
b).