Some functions have optional arguments

Which of the following is true about adding headings and subheadings in Word after a Table of Contents has been created?

A) The easiest way is to delete the current Table of Contents and create a new one. B) You cannot add headings and subheading after a Table of Contents has been created. C) The Table of Contents will automatically update itself to reflect the changes. D) The Table of Contents must be manually updated to reflect the changes.

In a binary search tree, the elements in the left subtree of the root are __________________ the root element.

a) greater than b) less than c) greater than or equal to d) less than or equal to e) equal to