Satellite radio transmissions, a popular feature in car stereos, differ from those of AM and FM radio, which is sent directly from earthbound towers and then to a car stereo.
A) which is sent directly from earthbound towers and then to a car
“which” refers to transmissions from AM and FM radio. We need to use the plural verb- “are” and not “is” to refer to the plural noun- transmissions.
We need to use the use the possessive noun- car’s stereo.
B) which are sent directly from earthbound towers to a car's
Both the errors in option A are corrected in Option B.
B is correct.
C) sent from earthbound towers and then directly to a car
We need to use the use the possessive noun- car’s stereo.
From earthbound towers to a car’s stereo is the correct idiomatic usage.
D) sending them directly from earthbound towers to a car’s
“ing” modifier distorts the meaning of the sentence.
E) being sent directly from earthbound towers to a car
We need to use the use the possessive noun- car’s stereo.
The modifier- “being sent” distorts the meaning of the sentence.