Normally, drinking from 4:30pm - 6pm is not a healthy practice. But the invention of the happy hour made it socially acceptable and also helped firms because of this kind of pricing strategy...

Premium pricing

Off-Peak daily rate changes

Segment pricing

Positioning pricing

Off-Peak daily rate changes

Explanation:

Off peak daily rate changes is strategically changing the price of product and services based on time factor, when number of customer turnaround is very less. The price are fixed  lesser than that of price during normal of peak demand time so that customer are motivated to buy the product.

As given in question, early evening drinking time is not considered a healthy drinking practice, hence to induce customer to use drinking service at that time, slightly reduced prices are charged, business have defined it as happy hour .

Since this is time based pricing strategy it can be termed as Off peak daily rate changes.

the correct answer is:     [c]:     " cyclical unemployment " .