Which One of the Following Statements Concerning Fluid Streamlines Is

Multiple Choice

Which one of the following statements concerning fluid streamlines is true?

A) In steady flow,streamlines must remain parallel and equally spaced.
B) In turbulent flow,two or more streamlines may cross.
C) In turbulent flow,streamlines can begin or end at any point.
D) Streamlines are perpendicular to the velocity of the fluid at every point.
E) In steady flow,the pattern of streamlines does not change with time.