please help

Ax? Siw' II] A glass pipe has 3 sections, A, B and C, with different diameters; Section B is the narrowest. Each section is attached with a U-shaped glass tube filled with water. An air stream flows through the pipe and its animation is shown above; please right click and select VidEO CONTROLS to play. Why is the water in one-side of the U-shaped glass tube in section B the highest? Why is the water in one-side of the U-shaped glass tube in section B the highest? 0 Pressure in Section B is the highest, blowing the water to the highest level 0 BOTH pressure and vacuum in Section B are the lowest causing the water movement in the glass tube 0 BOTH pressure and vacuum in Section B are the highest causing the water movement in the glass tube 0 Vacuum in Section B is the highest, sucking the water to the highest level