Look here! What do you start out from, above Twelve-Mile Point, to cross over?' 'I—I—don't know.' 'You—you—don't know?' mimicking my drawling manner of speech. 'What DO you know?' 'I—I—nothing, for certain.' What does the stammering suggest about the narrator?
a. It suggests that he is rethinking his response.
b. It suggests that he is uncertain and intimidated.
c. It suggests that he is very worried about something.
d. It suggests that he has a hard time expressing himself.