Why are event schemata difficult to change? they are concepts stereotypes diverse automatic?

The correct answer is option A, Concepts.

Explanation:

Event Schemata is the concept of Psychology and cognitive science. It is a mental concept. In this concept, people tell their brains what to expect  in a certain situation or from a particular person or event, etc. People perceives other things or people on the basis of a variety of experiences and situations. Some of the examples of Event Schemata are Social Schemas, Stereotypes, Social Roles, Scripts, World Views, etc.

For example, in the past few years, it was the thought that the whole world's economy is in recession. So if you had asked a Lehman about what he thinks of the world's economy, he would definitely tell you that the world's economy is in recession. This is the Event Schemata in which the person has the concept which he got from the World Views. Because the world thinks like that, he has the same concept about it as well.  

it apply by theyre artifacts