Psychology - Cross-cultural research?

Cross-cultural research has examined the type of attributions made by Chinese and American participants. Which of the following is the best conclusion from this research?

a. Strong cultural differences have been found, and these differences are due to the ancient traditions within the two cultures

b. Cultural differences have been found, but it was difficult to determine precisely why or what such differences mean

My book says that...

To the extent that Asian people respond differently from Western-culture people, is that difference due to ancient traditions or current conditions? In my opinion, I think the correct answer is B. because they cannot figure out the answer to the remaining question. Is my answer correct?