In the class BinaryNode, what value is stored in rootPtr if the tree is empty?

Which of the following macro security settings is the default setting in Word?

A) Disable all macros with notification B) Trust access to the VBA project object model C) Disable all macros without notification D) Disable all macros except digitally signed macros

What are the four questions that must be considered when constructing a recursive solution?

What will be an ideal response?