Water flows through a hose (pipe), whose internal diameter is 2.0 cm at a speed of 1.0 ms⁻¹. What should be diameter of the nozzle, if the water is to emerge at a speed of 4.0 m s⁻¹?
A. 1 m
B. 1 cm
C. 0.005 m
D. 0.5 m