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

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.

changing the way files are displayed. you can choose to view the contents of a folder in a variety of ways.

sorting files and folders. when viewing files in window explorer, you can sort your files and folders in a number of ways.

grouping files and folders.

explanation:

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