What Is the Explanation for Why Neptune's Moon Triton Has

Multiple Choice

What is the explanation for why Neptune's moon Triton has peculiar orbital characteristics?

A) It is believed that this object formed elsewhere and was later captured by Neptune.
B) Triton has frequent interactions with Neptune's other moons.
C) Triton is known to have had a collision with a passing asteroid recently.
D) Triton is believed to have formed with Neptune and by coincidence started with its peculiar nature.