Read the following context and choose the best option to answer the question.
Context: I recently had to order some text books through Amazon books . They had the best prices anywhere online . Text books can get really expensive so it 's nice if you can get a $ 20 or $ 30 discount .
Question: What happened after they placed an order ?
Options: 
- They received the discount of $ 20.00
 - Amazon refunded their money because they did not have the textbooks .
 - None of the above choices .
 - Amazon did not apply the discount so the textbooks were full price .


They received the discount of $ 20.00