Are the following statements true or false?

(a) Because cesium chloride has chloride ions at the corners of the unit cell and a cesium ion at the center of the unit cell, it is classified as having a body-centered unit cell.

(b) The density of the unit cell must be the same as the density of the bulk material.

(c) When x-rays are passed through a single crystal of a compound, the x-ray beam will be diffracted because it interacts with the electrons in the atoms of the crystal.

(d) All the angles of a unit cell must be equal to 90°.