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door-to-door selling
a method of presenting and selling products or services in which a salesperson goes to the residences or homes of potential buyers, knocking on their doors to solicit business
EXAMPLE:
"Many homeowners dislike door-to-door selling and consider it to be disturbing to their privacy."
feasibility test
(noun)
a procedure or basis for evaluation or assessment to see if something is capable of being accomplished or brought about, or is possible
EXAMPLE:
"A business will often do a feasibility test on a product before spending money to market it to consumers."
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