When the man was searching his hip pocket for a match, the author_____.

A．valuable because they provide a picture of the ways the mind works in perceiving word symbols
B．worthless because eye movements have nothing to do with skillful reading
C．worthless because they tell us little about how expert readers' functions are
D．valuable because they tell us much about the way the eye is put together

A．the author's experience of borrowing a match upon the street
B．the clash between the author and the decent man
C．the decent man's complaint against his boy
D．the decent man's futile searching through his pockets