What is the best way, if any, to revise sentence (7)?
(6) the fingerprints of one person may be distinguished from those of anyone else in the world. (7) when a set of fingerprints is sent to a crime laboratory for identification. (8) the general pattern of the prints is verified first. (9) the unique combination of the loops, arches, and whorls determines the shape of the ridges on a person's fingertips. (10)the particular shape is then checked to see if there is a match with any set of prints on file with the authorities.2

a) leave the sentence as is.
b) remove it from the passage.
c) combine it with sentence (8).
d) combine it with sentence (6)