During DNA replication, the new DNA is formed on the lagging strand in a series of independent short sections because
选项：

A:DNA polymerase III can synthesize DNA in both the 3_ to 5_ and 5_ to 3_ directions but makes more mistakes when working in the 5_ to 3_ direction.;
B:DNA polymerase III can only operate in the 5_ to 3_ direction.;
C:Thymine dimers are excised from the growing strand, leaving it cut into short fragments.;
D:The hydrogen bonding between adenine and thymine is relatively weak.;
E:DnaA causes the DNA strands to melt.