Which of the Following Statements About Thymine Dimers Is False

Which of the following statements about thymine dimers is false?

A) They are repaired by excision repair.
B) They are repaired by one enzyme that can clip out, lay down new nucleotides, and seal the gap.
C) Patients with xeroderma pigmentosum have faulty DNA repair mechanisms.
D) If resulting mutations accumulate, it can result in cancers.
E) They can be produced by exposure to UV light.