What are the first two models, e. g. diagrams that affect the entire system, that are built during the CoreProcess to discover and understand the details?

a. Workflow diagram

b. Work sequence diagram

c. Use case diagram

d. Class diagram.

e. Package diagram

f. Screen layouts

The answer is "Option c and Option d".

Explanation:

A diagram for a case use is a UML dynamic or computational diagram, that is used in the case diagram model. It consists of a set of actions, services, and functions to be carried out by the system. and The class diagram refers to relationships between the UML classes and the source code that dependence, that is two diagrams that affect the system and others are wrong, which can be explained as follows:

In option a, It is used for business process, that's is not correct. In option b, It is used for both professionals industry like software and business, that's why it is wrong. In option e, It is used in only high-level language, that's why it is wrong. In option f, It is used to adjust its layout that's why it is wrong.