As the temperature increases, the spacing between the atoms in a crystal lattice increases

due to thermal expansion. Monochromatic X$-$rays illuminate the crystal, creating an X$-$ray

diffraction pattern. What will happen to the spots in the X $-$ray diffraction image during the

thermal expansion of the crystal?

A$.$ The spots will become sharper $($less spread out$),$ but the distance between spots will

remain the same.

B$.$ Thermal expansion of the crystal has no effect on the diffraction pattern.

C$.$ The spots will get brighter.

D$.$ The spots will move closer together.

E$.$ The spots will move further apart.