On Discovery channel last night they showed an informative program about new innovations in medical imaging, which you would have found interesting.

• A. 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 innovations in medical imaging, a program you would have found interesting.