Some Mariner Elements Show a High Degree of Similarity Between

Multiple Choice

Some mariner elements show a high degree of similarity between organisms that are separated by millions of years of evolutionary time.What is the current explanation for this?

A) Mariner is highly conserved.
B) Mariner was horizontally transferred by bacterium.
C) Mariner was horizontally transferred by virus.
D) Mariner elements in divergent species have arisen through inter-species breeding events.
E) None of these