Vladimir Understands That Even When He and His Friend Have

Vladimir understands that even when he and his friend have the same information,they may have different points of view; however,Vladimir is not able to simultaneously consider his and his friend's perspective.Based on Selman's stages,,how old is Vladimir?

A) 4 to 6 years
B) 6 to 8 years
C) 8 to 10 years
D) 10 to 12 years