There is another planet，Eris，floating in space.But the small planet similar to Pluto will remain safely fixed in the outer solar system and it can come no closer than four billion miles to the Earth，according to NASA.

　　Initial theories set the disaster for May 2003，but when nothing happened the date was moved forward to the winter in 2017 to coincide with the end of a cycle of the ancient Mayan calendar.

　　NASA insisted the Mayan calendar in fact does not end on December 21,2017，as another period begins immediately afterward.

　　And even if the planets were to line up as some have forecast，the effect on our planet would be “negligible”，NASA said.

　　“And while comets and asteroids(小行星)have always hit the Earth，big hits are very rare，”NASA noted.The last major impact was believed to be 65 million years ago，resulting in the end of dinosaurs.

　　“We have already determined that there are no threatening asteroids as large as the one that killed the dinosaurs，”the space agency said.

　　【解题导语】 2017世界末日真的会到来吗？美国宇航局对电影《2017》进行了批驳。

　　48．________played a key role in the spread of the rumors.

　　A．A new book

　　B．The Internet and a new Hollywood movie

　　C．NASA

　　D．An Indian calendar

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