Nereid Orbits Neptune in a Highly Elliptical Orbit,and Triton Has

Nereid orbits Neptune in a highly elliptical orbit,and Triton has a retrograde orbit around Neptune.This information suggests that

A) Neptune formed out of the solar nebula in much the same manner as the other Jovian planets.
B) Pluto was probably a moon of Neptune that escaped.
C) Triton and Nereid are both captured objects from the inner solar system,probably the asteroid belt.
D) Triton and Nereid may both have suffered major impacts that radically changed their orbits.
E) Triton and Nereid should both have relatively strong magnetic fields.