Why does finny rush out of the assembly room during the inquiry?

a.
finny does it for dramatic effect, to make the boys feel bad.

b.
finny is annoyed with the boys for bringing up his fall from the tree.

c.
finny feels it is no one's business and says that he doesn't care.

d.
finny doesn't want to confront the unpleasant truth that gene caused his fall.