Which of the following accounts for the difference in the mode of conduction of electricity by metals and aqueous salt solutions?

A. Electrons are present in metals but not in salt solutions
B. Metals are conductors while salts are electrolytes
C. Electricity is carried by mobile electrons in metals but by ions is an aqueous salt solution
D. salts ionize in aqueous solutions while metals do not
E. Metals are reducing agents while salts are not

Correct Answer: Option C

C. Electricity is carried by mobile electrons in metals but by ions is an aqueous salt solution