The satellite Orbiter will spend some time hunting for
brown dwarfs, masses of gas smaller than our Sun, which are too cool to burn and which may make up the Universe's 'Invisible dark matter'A.) brown dwarfs, masses of gas smaller than our Sun, which are too cool to burn and which may make up the Universe's 'Invisible dark matter' - Correct
B.) brown dwarfs which are masses of gas smaller than our Sun, which are too cool to burn and which may make up the Universe 'Invisible dark matter' - Which needs to be preceded by a comma; we need a possessive - Universe's IDM
C.) brown dwarfs, masses of gas smaller than our Sun, that are too cool to burn and which may make up the Universe's 'Invisible dark matter' - parallelism issue - that and which -- which should be preceded by a comma
D.) brown dwarfs; masses of gas smaller than our Sun that are too cool to burn and that are making up the Universe's 'Invisible dark matter' - After semicolon, there should be an independent clause
E.) brown dwarfs that are masses of gas smaller than our Sun, which are too cool to burn and which may make up the Universe 'Invisible dark matter' - we need a possessive - Universe's IDM
1. In OA -A,
'which' has plural verb 'are' and thus (CANNOT refer to Sun)can refer either to masses of gas or to brown dwarfs? Then how do we decide to which noun 'which' refers to? ( I do understand that the phrase "masses of gas smaller than our Sun" modifies brown dwarfs.)
The satellite Orbiter will spend some time hunting for
brown dwarfs, masses of gas smaller than our Sun, which are too cool to burn and which may make up the Universe's 'Invisible dark matter'2. In option D, the part after the semicolon is as follows-
masses of gas smaller than our Sun that are too cool to burn and that are making up the Universe's 'Invisible dark matter' --
here that has a plural verb 'are' and thus will refer to masses of gas.
Also, masses of gas CANNOT refer to 'brown dwarfs' because it is an independent clause separated by a semicolon?
AjiteshArun ,
GMATNinja ,
MagooshExpert ,
GMATGuruNY ,
VeritasPrepBrian ,
MartyMurray ,
DmitryFarber ,
daagh ,
generis , other experts - please enlighten