[单选题]
Which of the following is/are ch6yffz + ;uq1jtaracterist qjs1 qz+bm6k:ic(s) of Taq polymerase?
I. Requires a DNA primer
II. Works well at temperatures above 98°C
III. Used in gel electrophoresis to fluorescent tag DNA molecules
A. I only
B. I and III only
C. II and III only
D. I, II and III