Answer: B. Americans are more savage than the English
Explanation:
Upon reading this excerpt, the reader first has the impression that it's about raising a child well and American parenting practices. However, the authors quickly reveals that it's about cannibal practices in America, because the text literally is about cooking the meat of children ("<em>a young healthy child well nursed is, at a year old, a most delicious, nourishing and wholesome food, whether stewed, roasted"</em>).
The fact that the author was told all these by <em>"a very knowing American" </em>suggests that cannibalism is common practice in America, which makes Americans mare savage than the English. This is quite shocking, but, in that time and age, savage practices were quite common.