Kendrik Was Frustrated That His DVD Player Wouldn't Play a DVD

Kendrik was frustrated that his DVD player wouldn't play a DVD he purchased while on vacation in Great Britain. When he called the manufacturer to complain, he was told that European DVDs are formatted differently and won't play on all machines. This is evidence of how ________ can place a constraint on global markets.

A) differences in technical standards
B) purchasing parity
C) cosmopolitan tastes and preferences
D) market segments that transcend national borders
E) a convergence of cultures