Define conductivity and molar conductivity for the solution of an electrolyte and discuss their variation with concentration.

A) Conductivity is the ability of a solution to conduct electricity, while molar conductivity is the conductivity of a solution divided by the molar concentration of the electrolyte.
B) Conductivity increases with the concentration of ions in the solution, while molar conductivity decreases with increasing concentration.
C) Both A and B
D) None of the above