It contains more molecules than atoms. It contains more electrons than protons. It is carrying an electric current. It is made of metal.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which of the following describes an object that must have a net negative charge?
Possibilities:
- It contains more molecules than atoms.
- It contains more electrons than protons.
- It is carrying an electric current.
- It is made of metal.

It contains more electrons than protons.