Parents entering US with B1/B2 visa to visit family

My parents are pushing to prod next month—flying from Mumbai to SFO on valid B1/B2 visas for a 4-week trip. They plan to stay with me at my apartment. I want to debug their entry process before they fly to ensure optimized code for their arrival. \n\nWhat is the logic check for the CBP interview? Specifically, should they explicitly state they are staying with me (since accommodation is free), or should they emphasize the tourism aspect more? I want to avoid edge cases where CBP assumes they are here to work or babysit (even though I don’t have kids). Any guidance on the correct variables to present?