This fails to address the paleontologists’ key claim that G. bullatus’s comblike plate is evidence that it fed by filtering food from water and mud, nor does it help to make this hypothesis more likely.

Like (A), this ignores the paleontologists’ primary argument, which is about the comblike plate, not the toothless beaks and weak jaw muscles. Also, we already know that G. bullatus was an ornithomimid with a toothless beak and weak jaw muscles, so (B) is irrelevant.

This weakens the paleontologists’ hypothesis by suggesting that G. bullatus and modern ducks and geese are not physically similar apart from their comblike plates.

This strengthens the argument by affirming one of the paleontologists’ key assumptions. If G. bullatus fed by filtering food from water and mud, they must have lived near water and mud, so their fossils would likely be found there too.

We already know that G. bullatus did have comblike plates, and the argument is concerned with whether they also fed by filtering food from water and mud. Whether any other dinosaurs had comblike plates is not relevant to the argument.