The Solid Structure That Results When Half of the Tetrahedral

The solid structure that results when half of the tetrahedral holes in an fcc lattice of anions are filled with cations with a 1:1 cation:anion ratio and a coordination number of 4 is called the _____.

A) sodium chloride structure
B) zinc blende structure
C) interpenetrating primitive cubic structure
D) cesium chloride structure
E) rock salt structure