Which of the following is not true regarding replicative transposition?

A) A transposase encoded by the element mediates an interaction between the element and a potential insertion site.
B) The element is replicated and one copy of it is inserted at the new site while one copy remains at the original site.
C) There is a net gain of one copy of the element.
D) All of these are true.
E) All of these are false.