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Q8 Single choice

A developer created a Lightning component to display a short text summary for an object and wants to use it with multiple Apex classes.

How should the developer design the Apex classes?

A
Have each class define method getObject() that returns the sObject that is controlled by the Apex class.
B
Extend each class from the same base class that has a method getTextSummary() that returns the summary.
C
Have each class implement an interface that defines method getTextSummary() that returns the summary.
D
Have each class define method getTextSummary() that returns the summary.

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CRT-450 Web TestEngine demo