Refer to the diagram of recepticals. It is impractical to install a grounding conductor to any of the recepticals in this figure. Which is the correct method to use when replacing induced non-grounding recepticals with groundin g type recepticals?

Refer to the diagram of recepticals. It is impractical to install a grounding conductor to any of the recepticals in this figure. Which is the correct method to use when replacing induced non-grounding recepticals with groundin g type recepticals?