It's called an upselling
It's a common technique that a salesman/ marketing team use to increase profit with promise that the customer will get a better product or service
The example of an upselling is when you want to buy a cheap house, but the salesman manage to convinced you that buying another expensive house is good for your investment, and you buy the expensive one instead.
Answer:
1) strong form efficient.
Explanation:
The efficient market hypothesis states that all the relevant information regarding stocks traded in a market is already included in the price of the stocks.
This investment theory argues that if all the relevant information was public, then even if a person had insider information, it would be useless since everyone should have access to the same information. Of course this model is only theoretical, since in real life information is something very valuable and not everyone has access to it.
