TOEFL Reading: ETS-TOEFL阅读机经 - 5B17HICC4H1W4FS3L$

Why does the author point out that "The eyes of some Burgess organisms sat on stalks"? A. To suggest that some Burgess organisms had a greater range of vision than do living shrimp and crabs B. To explain why it is thought that one of the lateral pairs of eyes in Opabinia may have been movable C. To explain why the eyes of some Burgess animals were not recognizable as such before they were reconstructed D. To support the statement that the reconstructed eyes of Burgess animals look superficially like the eyes of some living crustaceans