What are the differences between the white church that Scout and Jem usually attend and the black church where Calpurnia takes them? What do Scout and Jem notice about the way that Calpurnia
talks when she is among other African Americans at church? How does Calpurnia explain the
difference? Do Scout and Jem approve of the way she talks to other African Americans?

Explanation:

In Harper Lee's To Kill a Mockingbird, Chapter 12, one salient difference between the church of Calpurnia and the Maycomb Methodist Episcopal Church South is that the black church allows the children, Scout and Jem, to remain whereas the white churches are strictly segregated

it would be d because the however is more proper and the comma is placed in the right spot