While researching the fossil organism *Hallucigenia sparsa*, a student took the following notes:
- *Hallucigenia sparsa* is a fossil marine organism first discovered in Canada in .
- In , Simon Conway Morris reconstructed the animal as walking on its stiff spines with tentacles along its back.
- In , paleontologists Lars Ramsköld and Hou Xianguang analyzed Chinese fossils of the species.
- Ramsköld and Hou determined that the reconstruction was upside down: the spines served as defensive dorsal armor, while the tentacles were actually ventral walking claws.
- In , researchers Martin Smith and Jean-Bernard Caron identified the organism's head, which had previously been mistaken for its tail.
The student wants to emphasize the specific revision made by Lars Ramsköld and Hou Xianguang to the reconstructed function of the animal's spines and tentacles. Which choice most effectively uses information from the given notes to accomplish this goal?
- AAlthough *Hallucigenia sparsa* was first discovered in , it was Simon Conway Morris who first reconstructed the animal in with tentacles along its back.
- BLars Ramsköld and Hou Xianguang revised the reconstruction of *Hallucigenia sparsa* in by demonstrating that the organism's head and tail had been swapped in previous models.
- In , Lars Ramsköld and Hou Xianguang corrected the reconstruction of *Hallucigenia sparsa* by showing that its spines were defensive armor rather than stilts for walking, and its tentacles were claws.Answer
- DBy studying fossils from China, Ramsköld and Hou proposed that *Hallucigenia sparsa* developed defensive armor because it faced intense predation from larger marine species.