86.
An international team of astronomersworking at telescopes in the Canary Islands and Spain has detected at least 18huge gas spheres estimated to have 5 to 15 times the mass of Jupiter, thesolar system's largest planet.
(A) astronomers working attelescopes in the Canary Islands and Spain has detected at least 18 huge gasspheres estimated to have 5 to 15 times the mass of Jupiter
(B) astronomers working attelescopes in the Canary Islands and Spain has detected at least 18 huge gasspheres estimated to be 5 to 15 times Jupiter's mass
(C) astronomers is working attelescopes in the Canary Islands and Spain, having detected at least 18 huge gasspheres that are estimated at 5 to 15 times the mass of Jupiter
(D) astronomers, working attelescopes in the Canary Islands and Spain, and has detected at least 18 hugegas spheres estimated at 5 to 15 times the mass of Jupiter
(E) astronomers, working attelescopes in the Canary Islands and Spain, has detected at least 18 huge gasspheres they have estimated to be 5 to 15 times Jupiter's mass
语法笔记上面说BCD是比较双方不对等。但BCD和A的比较不是一样的么，都是gas spheres和themass of Jupiter啊。还是说A选项中由于用了have因此不构成比较，而BCD中用的是be所以是比较？求指点
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