Prompted by recent discoveries, paleontologists have started research on the fossils of feathered dinosaurs, a study that, igniting the debate over when and why dinosaurs developed plumage, and that makes many researchers believe that possibly all or most of them had feathers.
A) research on the fossils of feathered dinosaurs, a study that, igniting the debate over when and why dinosaurs developed plumage, and that makes
B) research on the fossils of feathered dinosaurs, a study that has ignited the debate over when and why dinosaurs developed plumage and that makes
C) researching the fossils of feathered dinosaurs, a study igniting the debate over when and why dinosaurs developed plumage, and made
D) research on the fossils of feathered dinosaurs, the study has ignited the debate over when and why dinosaurs developed plumage, making
E) researching the fossils of feathered dinosaurs, igniting the debate over when and why dinosaurs developed plumage, and the study makes
Source- e-gmat
Can you please explain why option D is wrong and why option B is right?
A) research on the fossils of feathered dinosaurs, a study that, igniting the debate over when and why dinosaurs developed plumage, and that makes
B) research on the fossils of feathered dinosaurs, a study that has ignited the debate over when and why dinosaurs developed plumage and that makes
C) researching the fossils of feathered dinosaurs, a study igniting the debate over when and why dinosaurs developed plumage, and made
D) research on the fossils of feathered dinosaurs, the study has ignited the debate over when and why dinosaurs developed plumage, making
E) researching the fossils of feathered dinosaurs, igniting the debate over when and why dinosaurs developed plumage, and the study makes
Source- e-gmat
Can you please explain why option D is wrong and why option B is right?
