Spring Airlines is a small budget airline that is based in China. The company has a strict rule against passengers bringing any food or beverage on board with them. In a country where meal time is extremely important, this has caused some passengers to slap, throttle, and insult stewardesses who tried to enforce this rule. The tenacity with which the company's employees enforce this ruling is based on how the employees predict customers will react to the news. This is an application of the theory.

a. psychological
b. estimation
c. equity
d. expectancy
e. reevaluation

(D) Expectancy theory

Explanation:

 The expectancy theory is one of the mental process or the act in which the various types of people are behave in the certain ways as they are get influenced for selecting or also choosing the specific behavior and also the outcome of the individual person.

According to the given scenario, the spring airline is one of the small budgeting firm where the employees are enforce the ruling for predicting the customer reaction on the news and this situation is refers to the expectancy theory.

 Therefore, Option (D) is correct answer.  

i would prefer to go with the news article for nate, its recent and updated and stores a lot of information