Why Was It Important to Use a Wide Variety of Donor

Why was it important to use a wide variety of donor DNA for the Human Genome Project?

A) Each person's genome is 99 percent different from every other person's genome.
B) The single-stranded DNA found in each person's genome first had to pair with a strand from another person.
C) The wide variety allowed scientists to avoid using a genome with significant mutations as the benchmark.
D) Mixing human genomes with other animal genomes gave a more accurate final sequence.