In humans and in chimpanzees, 99% of the Alu retrotransposons are in corresponding positions.Which of the following statements below is the most likely explanation for this similarity?

A)The Alu retrotransposon is not capable of transposition in humans.
B)Most of the Alu sequences in the chimpanzee genome underwent duplication and divergence before humans and chimpanzees diverged.
C)The Alu retrotransposons are in the most beneficial position in the genome for primates.
D)The Alu retrotransposons must also be in the same position in flies.