The correct answer is B. As speed of a fluid increases, the pressure within decreases.
Using formulas, Bernoulli's principle can be written as
[tex]p+ \frac{1}{2}\rho v^2 + \rho g h=cost. [/tex]
where p is the pressure of the fluid, [tex]\rho[/tex] its density, v its speed, and h its elevation above a reference level.
Assuming h does not change, we can see that if the speed v increases, the pressure p must decrease in order to keep constant the sum of the three terms.
