Final answer:
Sudan has the lowest rate of female genital alteration among the given options.
Step-by-step explanation:
The country with the lowest rate of female genital alteration among the given options is d) Sudan. Female genital alteration refers to the practice of altering or removing female genitalia for non-medical reasons. Sudan has made significant efforts to eradicate this practice and has implemented laws criminalizing it. While female genital alteration is also practiced in Somalia, Egypt, and Nigeria, Sudan has made more progress in reducing its prevalence.