What additions must you make to the cell for it to generate a standard emf? Check all that apply

What additions must you make to the cell for it to generate a standard emf?

Check all that apply.

• We should add enough salt containing B2+ into the glass containing the electrode B(s) to produce a 1 M B2+ solution.
• We should apply the initial emf to the electrodes.
• We should add enough salt containing A2+ into the glass containing the electrode A(s) to produce a 1 M A2+ solution..
• We should add enough salt containing A2+ into the glass containing the electrode B(s) to produce a 1 M A2+ solution..
• We should add enough salt containing B2+ into the glass containing the electrode A(s) to produce a 1 M B2+ solution.
• We should add the salt brige.