Which of the following classes amongst these options is/are contextual?

d. All of the given options are correct
 
Explanation: The contextual classes are responsible for changing the background color of a table rows and the individual cells. The classes that can be used are:

1. .active – It is responsible for applying the hover color to a particular row or cell.
2. .success – It is responsible for showing the positive or successful action.
3. .info – It is responsible for showing the informative part of a section.
4. .warning – It is responsible for emphasizing on the warning that needs some sort of attention
5. .danger – It is responsible for showing or highlighting a potentially negative action or any dangerous information.