A.Use @future methods to handle DML operations.

B.Use (callout=true) to update an external system

C.Use a Map to reduce the number of SOQL calls

D.Use a Set to ensure unique values in a query filter

A.Public void doWork(Account Contact)

B.Public void doWork(sObject theRecord)

C.Public void doWork(Account || Contatc)

D.Public void doWork(Record theRecord)

A.Build a OpportunityLineItem trigger that adds a PriceBookEntry record.

B.Build an Opportunity trigger that adds a PriceBookEntry record.

C.Build an Opportunity trigger that adds an OpportunityLineItem record.

D.Build an OpportunityLineItem trigger to add an OpportunityLineItem record.

A.a, a, a

B.a, b, b

C.a, b, getMyString

D.b, a, getMyString

A.Access data in @TestVisible class variables.

B.Use a test data factory class to create test data.

C.Query for existing records in the database.

D.Execute anonymous code blocks that create data.