13. As shown in Fig. 8, water flows out from F in speed v (m). The density of water is ρ (kg/m³) and negligible viscosity. The cross-sectional area of the tube is A (m²), which is much smaller than that of tank. The atmospheric pressure is P₀ (Pa or N/m²). Which statement is correct?

(A)
(B) Pressure at D is ρgd₁
(C) If the water flows, pressure at E inside the tube must be zero.
(D) Water flows only when d₂ ＞ d₁.
(E) Whether water flows or not is independent of the distance between E and the upper surface of water.