Answer: Option (A) is the correct answer.
Step-by-step explanation:
The valence electrons are the electrons which are present in the outermost shell of an atom.
A silver atom contains a positive charge as silver is a cation.
In a piece of silver, the silver atoms will be linked together. As it is known that silver is a cation, it will hold a positive charge.
Therefore, it can be concluded that in a piece of silver, the valence electrons will be moving freely between the cations.