Which of the following can be inferred regarding the pulsar discussed in the first paragraph? A. Theorists initially doubted its existence B. If its existence had been confirmed, astronomers would and have turned their attention to the pulsar discussed in the second paragraph. C. If the supernovas explosions that created it had been more powerful, the resulting radiation would have preceded the subsequent formation of a planet. D. If it had interacted with a nearby star since the supernova explosion, it would rotate faster than it does. E. Astronomers' interest in it ultimately led to a new theory of planetary formation.