For indicating variables in Bootstrap, use the _________ tag.

 Which of the following clears bottom-margin of each panel? 

The .mx-auto class in Bootstrap sets the display property to what value?

  Which class should be used for creating page navigation with Previous and Next. 

Spacing utilities that apply to all breakpoints, from xs to xl, have how many breakpoint abbreviations in them?

The ______ class is used for horizontally centering fixed-width block-level content.

Which of the following third-party widgets typically make use of tables?

What class name would you make a full width container in Bootstrap? 

Which of the following Bootstrap classes is not available for aligning media objects?

What is the purpose of the HTML code <span class="border-top-0"></span>?