The Porosity of Vesicular Basalt Is About 30%;however,when Water Is

The porosity of vesicular basalt is about 30%;however,when water is poured on it,the water does not come out the other side.How is this possible?

A) The vesicles in basalt are filled with sediments and thus cannot hold water.
B) The vesicles in basalt are not connected,so it has no permeability.
C) The minerals in the basalt react chemically with the water to produce gases.
D) Vesicular basalt is similar to a sponge and will soak up all the water.