A.Loading test data in place of user input for Flows.

B.Executing methods for negative test scenarios

C.Loading the standard Pricebook ID using a system method

D.Executing methods as different users.

A.Salesforce Extension for VSCode

B.Developer Console

C.Third-party apps from App Exchange

D.Setup Menu

A.Exception handling

B.Validation rules

C.Lookup filters

D.Page layouts

E.Workflow alerts

A.List

B.sObject

C.Integer

D.Long

A..addError()

B.ApexPages.addErrorMessage()

C.A custom exception

D.A try/catch construct

E.Database.handleException()