>>10299708It's not about research, but also about the licensor (in this case Mattel). The production had to get permission from Mattel to use American Girl dolls here, and Mattel probably limited them to which dolls they can use along with how they're represented in the scene. Dolls chosen were vetted and cleared by Mattel, so it's probably Mattel saying to use those dolls here, rather than the production company choosing the dolls.
