Final answer:
The prosecuting attorney is responsible for preparing a case against an offender in a criminal case, representing the government to prove the defendant's guilt. The correct answer is option c.
Step-by-step explanation:
In a criminal case, the responsibility for preparing a case against an offender falls on the prosecuting attorney. This attorney represents the government, which is always the plaintiff in criminal proceedings, and they must prove beyond a reasonable doubt that the accused, or the defendant, is guilty of the crime they are charged with. The defense attorney, on the other hand, works to protect the rights of the defendant and to present all evidence and arguments that support their innocence or cast doubt on the prosecution's case.