Visitors to the Rodin Museum have often examined the enormous sculpture The Gates of Hell and saw figures clawing at the gates, whose eyes and mouths gape like black holes in the universe.

(A) saw figures clawing at the gates, whose eyes and mouths gape
(B) saw figures clawing at the gates, whose eyes and mouths were gaping
(C) saw figures clawing at the gates, with eyes and mouths gaping
(D) seen figures who claw at the gates, their eyes and mouths gaping
(E) seen figures clawing at the gates, whose eyes and mouths have gaped

OA: D

"their" in the OA can refer to gates or figures? Am I missing something? There is pronoun ambiguity in the OA as well.