The unique combination of the loops, arches, and whorls determine the shape of the ridges on a person's fingertips.
What is the BEST revision of sentence (9)?

A) (9) The unique combination of the loops, arches and whorls determine the shape of the ridges on a person's fingertips.
B) (9) The unique combination of the loop's arches, and whorls determine the shape of the ridges on a persons fingertips.
C) (9) The unique combination of the loops, arches, and whorls determines the shape of the ridges on a person's fingertips.
D) (9) The unique combination of the loops, arches, and whorls determine the shape of the ridges' on a persons' fingertips.