Which Question Below Is an Example of a Situational Question

Which question below is an example of a situational question?

A) "Suppose you were giving a sales presentation and a difficult technical question arose that you could not answer. What would you do?"
B) "Based on your past work experience, what is the most significant action you have ever taken to help out a co-worker?"
C) "What work experiences, training, or other qualifications do you have for working in a teamwork environment?"
D) "What factors should one consider when developing a television advertising campaign?"