How do I answer an Adventist question about the Sabbath?

I have friends who are 7th day adventist and I would like to know how to answer the question concerning the changing of the sabath from Saturday to Sunday. How do I approach this issue?

These links should be helpful. If you have any further questions or concerns that are not answered by these links, please contact Catholic Answers directly.
Recommended Reading:

*]Why do Catholics worship on Sunday?
*]Who started the Seventh-Day Adventists?
*]How do I talk with a Seventh-Day Adventist?
*]Can you recommend resources on Seventh-Day Adventism?
*]Seventh-Day Adventism
*]Sabbath or Sunday?
*]From Sabbath to Sunday by James P. Guzek

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