Q$7.$ A child is drinking a liquid with a straw. Which of the following statements is true?

A$.$ The fluid is being pulled up into the straw.

B$.$ It is easier to use a longer straw than a shorter straw, because liquid weight increases the pressure at the bottom.

C$.$ When the pressure in the straw is reduced, atmospheric pressure on the surface of the liquid pushes the liquid up the straw.

D$.$ Thick, viscous fluids are easier to drink with a straw than thin, non$-$viscous liquids.