Where is the hypothesis in this passage?

for an exercise in scientific inquiry, clark posed a question about density. he wondered if the density affected the liquid's ability to retain heat. before determining an hypothesis, clark researched density he knew that the denser a liquid is the more molecules it

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.