Explanation:

- The idiom "changed hands" typically refers to something being transferred from one person to another.

- It's commonly used to describe a change in ownership or possession.

- Let's analyze the options:

- Option 1: Change of ownership

- This option aligns with the meaning of the idiom "changed hands."

- The car having "changed hands" implies it now belongs to someone else.

- Correct Answer: Change of ownership

- Option 2: Change of driver

- This implies someone different is driving the car, not owning it.

- Option 3: Change of mechanic

- This refers to someone else performing maintenance or repairs on the car.

- Option 4: Change of machinery

- This might mean parts of the car were replaced, not its ownership.