Which of the following statement regarding the poly A tail of eukaryotic mRNA is correct?

A、The poly A tail is located at the 3′ end of RNA;

B、The poly A tail is transcribed from the DNA template;

C、Poly A tails can protect mRNA;

D、Poly A polymerase is a DNA-independent RNA polymerase involved in polyadenylation of RNA;

E、Most of eukaryotic mRNA have a ploy A tail