Answer:
D) the lowball technique
Step-by-step explanation:
The answer is --
D) the lowball technique
In the scenario, the shopkeeper advertises that customers can buy cell phone for half its price. And when thee customers came to buy the cell phones they came to the hidden fact that the cell phones are available at half its price only with purchase of $200 or above. At last the customers who came to buy cell phones ended up buying other products in order to purchase the cell phone at half price.
This persuasive tactic in the business world is called "the low ball technique".
In this technique, customers are attracted to purchase an item for a discount at the cost of or at the purchase of other items.
Thus the answer is --
D) the lowball technique