Graham had developed an extremely successful advertising and promotion campaign for a client in the United States. The client wanted to roll out the same campaign to markets worldwide, but Graham cautioned against doing this, most likely because

a. he did not have the budget for a global rollout.
b. he was unfamiliar with the code of ethics for advertising in other countries.
c. he had not applied for or received international certification that was required for working outside the United States.
d. copyright and intellectual property concerns prevented him from wanting to share his good ideas outside of the U. S. market.
e. differences in languages, customs, and culture might make the campaign meaningless and ineffective in some markets.