Which sentence from chapter 3 of to kill a mockingbird best supports the idea that walter has had a change of heart?
a. "jem seemed to have little fear of boo radley now that walter and i walked beside him."
b. "when walter caught up with us, jem made pleasant conversation with him."
c. "by the time we reached our front steps, walter had forgotten he was a cunningham."
d. "jem ran to the kitchen and asked calpurnia to set an extra place, we had company."