Although DNA Is the Main Hereditary Material in All Life-Forms,it

Multiple Choice

Although DNA is the main hereditary material in all life-forms,it lacks one important characteristic of being a candidate for the first life-form.Why have researchers rejected the idea that DNA was found in the first life-form?

A) It does not function as a catalyst.
B) It is not stable enough to have withstood early Earth's harsh atmosphere.
C) Because it has only four different bases,it does not carry enough information;therefore,it cannot adapt and evolve.
D) The type of sugar found in DNA is much too complicated to have been present early in Earth's history.