Answer:
To answer Part A:
The best choice for how the author most develops Howard's character over the course of the passage is:
A. through Howard's interactions and conversations with William
For Part B:
The two quotations that best support the answer to Part A are:
B. "It called back to Howard the days when he and Grant, his younger brother, had fished in this little brook for trout, with trousers rolled above the knee and wrecks of hats upon their heads." (paragraph 5)
E. "His brother was awaiting him there, and his mother, whom he had not seen for ten years and who had lost the power to write." (paragraph 28)
These quotations provide insights into Howard's character through his memories, relationships, and the anticipation of reuniting with his family.