Which of the Following Is a Major Distinction Between a Transposon

Which of the following is a major distinction between a transposon and a retrotransposon?

A) A transposon always leaves a copy of itself at its original position and a retrotransposon does not.
B) A retrotransposon always uses the copy-paste mechanism, while a transposon uses cut and paste mechanism.
C) A transposon is related to a virus and a retrotransposon is not.
D) A transposon moves via a DNA intermediate and a retrotransposon via an RNA intermediate.
E) The positioning of a transposon copy is transient while that of a retrotransposon is permanent.