Which excerpt shows logos?

a. "next thing he knew, newsome was being marched into a live lineup at the police station . ."
b. "newsome and emerson didn't even look alike. newsome was nearly three inches taller. newsome had a mole on his nose. emerson didn't."
c. " to a generation's worth of research, we know an awful lot about the fickleness of memory."
d. "still, the practice draws plenty of resistance from police and prosecutors who worry that . . police departments with small staffs will have trouble finding someone who is unfamiliar with a case . ."