prep破解版 语法题，请教

Sophin

An international team of astronomers working at telescopes in the Canary Islands and Spain has

detected at least 18 huge gas spheres estimated to have 5 to 15 times the mass of Jupiter, the

solar system's largest planet.

(A) astronomers working at telescopes in the Canary Islands and Spain has detected at least 18

huge gas spheres estimated to have 5 to 15 times the mass of Jupiter

(B) astronomers working at telescopes in the Canary Islands and Spain has detected at least 18

huge gas spheres estimated to be 5 to 15 times Jupiter's mass

               答案是A，请教各位， be estimated to be 不是更正规吗。。。

毛毛carina

未划线的后半句the  solar system's largest planet应该是用来修饰 Jupiter， B选项中变成了修饰 Jupiter's mass ，逻辑不正确

Sophin

难道是因为the mass of Jupiter这个短语？