Which of the Following Is True Regarding the Attractive Force

Multiple Choice

Which of the following is true regarding the attractive force that holds sodium chloride in the solid state?
I.It is electrostatic in nature.
II.It is termed ionic bonding.
III.It varies with distance between the sodium and chloride.
IV.It operates only between adjacent sodium and chloride atoms.

A) I and II only
B) II and III only
C) I, II, and III only
D) II and IV only
E) I-IV are all true statements.