Charles is a federal judge whose judicial decisions are part of case law, which does not include interpretations of a. constitutional provisions. b. sound bites in the media. c. regulations created by administrative agencies. d. statutes enacted by legislatures

I believe the answer is B. sound bites in the media.
Sound bites in the media refers to the short phrases that summarize what the speaker have to say.
Even though sound bites often used in meda interview, it wouldn't played any role in interpreting judicial decisions.