Were it not for the fusion-powered heat and radiation that rush from its core, instead its own weight would cause a star to collapse.
A instead its own weight would cause a star to collapse
B instead a star would have collapsed under its own weight
C a star would have to be collapsing under its own weight
D a star would collapse under its own weight
E its own weight would have caused a star’s collapse哪位好心人士，帮忙解释下，我选的是E，答案是D。 这道题一点头绪都没有。 | 
