Which of the Following Is True with Regard to the New

Multiple Choice

Which of the following is true with regard to the new engine, upholstery, and stereo player the thief installed in John's car?

A) These improvements have to be returned to the thief.
B) These improvements now rightfully belong to John.
C) The improvements have to be paid for by John if he wants to retain them.
D) The improvements will be confiscated by the police.