Blu-ray region code symbol?

[kidd636]

I'm from the U.S. and my wife surprised me with a "Prison Break Complete Blu-ray Collection".

The thing that concerns me is that she purchased it from Amazon UK, and upon checking the product details in the website, it says that it's only Region B.

However, I noticed at the bottom of the box there's a symbol showing three worlds/circles in triangular formation and each circle has either "A", "B", "C" on it. Is this the region symbol? Does this mean that what my wife got was actually a Region ABC blu, and is playable here in the United States?

I don't want to open the package to test it since I don't want to void the return warranty just in case it's not playable in the U.S.