Final answer:
The correct answer is 5 years.
Step-by-step explanation:
The subject of this question is Health. The question is asking about the age at which the author's Mongolian friend told her she had to breastfeed. According to La Leche League International, the mean age of weaning a child from breastfeeding globally is 4 to 5 years. However, in America, most mothers wean their children much earlier. Therefore, in this case, the correct answer would be d) 5 years.