Satellite radio transmissions (N)
, a popular feature in car stereos, (Appositive)
differ (V) from
those (transmissions)
of AM and FM radio (prepositional phrase)
,which (transmissions of AM and FM radios) (N)
is (Not matching with transmissions of AM and FM radios)
sent (V)
directly
from earthbound towers
and then to a car stereo.
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--No problem in ,which as it's referring back to transmissions of AM and FM radios
--'is' is wrong. (S-V error). It should have been 'are'
--from ..and then to..(incorrect idiom). From...to is correct idiom.
A) which is sent directly from earthbound towers and then to a car--Incorrect due to reasons mentioned above.
B) which are sent directly from earthbound towers to a car's stereo
--Looks ok.
--S-V error corrected, correct use of idiom "from ...to"
--possessive form of noun car's stereo is fine.
C) sent from earthbound towers and then directly to a car
--what was sent? radios? transmissions?
--from earthbound towers to where?
--wrong use of idiom.
D) sending them directly from earthbound towers to a car's
--it says satellite radio transmissions differ from AM/FM transmissions by sending them(not sure which transmissions) from earthbound towers to a car's stereo.
E) being sent directly from earthbound towers to a car
--being sent? what were being sent? (wrong usage of being and we don't know what is being sent)