8. According to the passage a neutron star is

(A) a gaseous cloud containing heavy elements

(B) an intermediate stage between an ordinary star and a supernova

(C) the residue that is left by a supernova

(D) the core of an ordinary star that houses the thermonuclear reactions（B）

(E) one of billions of meteors that are scattered across the galaxy by a supernova

此题答案应该是c, 为什么选b呢？文中哪里有可以同义变换的叙述呢？