1. A nonprofit health organization provided contraceptive pills to members of an East African cattle-herding tribe. The women were very pleased to have a way to control their fertility and thanked the volunteers for the medication. Weeks later, when the volunteers were ready to leave, the local women presented them with a parting gifta necklace made from the birth control pills. It was then clear that the women had been wearing the pills as a charm to prevent pregnancy rather than swallowing them as the volunteers had assumed. How might this communication failure have been avoided