Which of the following is incorrect regarding DNA replication forks?

• A. DNA replication forks begin forming at the origin of replication (ORI).
• B. DNA replication forks are caused by helicase separating two complementary strands of DNA.
• C. There are two replication forks found in each replicating prokaryotic chromosome.
• D. DNA replication forks are found at both ends of the replication 'bubble'.
• E. None of the above are incorrect.