Where does Walmart get their bananas?

Could you elaborate on the sourcing process for Walmart's bananas? Specifically, are they sourced locally, internationally, or both? Additionally, what measures does Walmart take to ensure the quality, freshness, and sustainability of the bananas they offer to their customers? Furthermore, are there any certifications or standards that Walmart adheres to in relation to the bananas they sell? Lastly, what impact does the sourcing of bananas have on the local economies and environment of the regions they are sourced from?