When a molecule of double-stranded DNA undergoes replication, it results in
a. one double-stranded DNA molecule composed only of entirely new strands.
b. three double-stranded DNA molecules, each composed of sections of old and new strands.
c. two double-stranded DNA molecules, each composed of one new and one old strand.
d. four double-stranded DNA molecules, each composed only of old strands of dna?