Answer:
c. Norms.
Explanation:
When Elena noticed her friend getting uncomfortable when she kisses him on the cheeks as a form of greeting she was violating his norms.
Norms are something that is standard or typical.
In USA there they not used to kiss on the cheeks to greet their friends there would be some other norm of greeting someone.
All of the given answer options are necessary to operate the enterprise resource planning (ERP) system when defining a system landscape.
Enterprise resource planning (ERP) can be defined as a business strategy process through which business firms manage and integrate the main parts of their day-to-day business activities by using software applications.
The main objective and purpose of an enterprise resource planning (ERP) system is to significantly reduce costs by integrating all the operations of a business firm.
In Computer science, when defining a system landscape, all of the following are necessary to operate the enterprise resource planning (ERP) system:
Read more on ERP system here: brainly.com/question/25752641
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