Simplify the expression. 
Definitions:
International Selling
The practice of selling products or services beyond one's own country.
Customs
Established and traditional practices of a particular society, culture, or organization.
Cold Canvassing
The process of approaching potential customers or clients directly, without prior contact, to offer products, services, or information.
Telephone Consumer Protection Act
A United States federal law enacted in 1991 designed to restrict telemarketing calls, the use of automated telephone equipment, and the sending of unsolicited faxes and texts.
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