c.
Also, he should have feathers. And a longer head, if he's supposed to be a Velociraptor. As it is, Dinobot's beast mode looks more like a Deinonychus, a larger dromaeosaurid.
This has always been a problem not only in Transformers but Jurrasic Park, I guess people just think Raptor sounds cooler than Deinonychus. At least Dino Riders got it right.