Read the following context and choose the best option to answer the question.
Context: The prices represent Airmail rate to North America . Prices are subject to change without notice . No mimimum order via check , money order or credit card , but credit card orders under $ 15.00 will incur a $ 2.00 extra charge .
Question: Why are the prices a bit high ?
Options: 
A. It is for money orders .
B. It is for air freight .
C. None of the above choices .
D. It is for shipping to North America .


B