No, the answer is B. And I think point C and point B were intended to be shown at equal heights...
Or the pressure in the tube is lower since the water is moving there and the pressure is lower due to Bernoulli.
Yea that too. I have a feeling I'm going to be wrong, but I'm going to say that velocity at C is higher than velocity at B (continuity) and higher velocity = lower pressure (bernoulli)?
can you please elaborate on this a little more?