Rocks Laid Down at Around the Time of the Permian/Triassic

Rocks laid down at around the time of the Permian/Triassic mass extinction 250 million years ago contain a surprising amount of fullerenes (football-shaped carbon molecules) . What evidence is there that the fullerenes came from outer space?

A) The isotope ratio of carbon¹³ to carbon¹² is too great for the fullerenes to have originated on Earth.
B) The fullerenes show evidence of having been irradiated by the solar wind for millions of years.
C) Gases trapped inside the fullerenes could have come only from stars.
D) The rocks in which the fullerenes are found contain decay products of short-lived radioactive aluminum isotopes that are believed to be produced only in supernovae (explosions of stars) .