Diver Down 3

Now suppose you weld a cover to the top of the 10-m deep tank while leaving a small hole in the top. Then you weld a skinny, 10-m long pipe to the hole and fill it with about a gallon of water. What pressure does the diver at the bottom measure?

A) A bit more than 1 atmosphere

B) About 2 atmospheres

C) About 3 atmospheres

D) About 10 atmospheres

E) Something else