A Newtonian Fluid Is a Fluid Best Defined by Which

A Newtonian fluid is a fluid best defined by which one of the following:

A) its viscosity decreases as shear rate increases
B) its viscosity decreases as temperature increases
C) its viscosity increases as shear rate increases
D) its viscosity increases as temperature increases
E) its viscosity remains constant as shear rate changes
F) its viscosity remains constant as temperature changes