Which of the Following Is (Are) True

Multiple Choice

Which of the following is (are) true?

A) Naturally occurring DNA usually has negative supercoiling.
B) Forms with the same linking number can be interconverted without cleavage.
C) The twist value rarely changes in naturally occurring DNA.
D) All the answers are correct.
E) Naturally occurring DNA usually has negative supercoiling, and forms with the same linking number can be interconverted without cleavage.