The diagram below represents cross sections of equal-size beakers a, b, and c filled with beads.
which statement best compares the porosity in the three beakers?
(1) beaker a and beaker b have the same porosity, and beaker c has the least porosity.
(2) beaker a and beaker b have the same porosity, and beaker c has the greatest porosity.
(3) beaker b has the greatest porosity, beaker a has less porosity, and beaker c has the least porosity.
(4) beaker c has the greatest porosity, beaker b has less porosity, and beaker a has the least porosity.