Answered

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If we have a book object but we do not give it a "subtitle" property, the following code will return undefined. bar len = book.subtitle.length;
a) true
b) false

Sagot :

Answer:

The answer is "Option a"

Explanation:

In the given question, this statement is true because in this bar len as a reference is declared that creates a book class object that calls the subtitle length method, that's why it is true.

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