In Option D- If comma is not used before "that", would the statement be correct then?
I thought this statement is wrong because "that" is modifying "imaging", instead of modifying "program". So in the above statement, without comma, does "that" modify "program".
Please help me understand as I seem to be missing basic grammar rules.
mayankgupta01
On Discovery channel last night
they showed an informative program about new innovations in medical imaging, which you would have found interestingA. they showed an informative program about new innovations in medical imaging, which you would have found interesting.
B. they showed an informative program about innovations in medical imaging, which you would have found interesting.
C. they showed an informative program about innovations in medical imaging, that you would have found interesting.
D. there was an informative program about new innovations in medical imaging, that you would have found interesting.
E. there was an informative program about innovations in medical imaging, a program you would have found interesting.
Please provide reasoning?

Option A is wrong because here which is referring to medical imaging instead of informative program.
as per the context of the sentence, it is informative program would have found interesting not medical imaging is interesting.
Also there is no referent for pronoun they.
Option B is wrong - same reason as above.
Option C is wrong- no referent for they & also comma should not be used before that unless the before sentence is a modifier.
Option D wrong - comma used before that
Option E - Correct