B. knock around
Feedback hit back - to attack in response.
knock around - 1. to hit a few times 2. to spend time without any aim 3. to travel 4. to discuss something.
go out - 1. to leave the house 2. to date with somebody 3. to stop working 4. to move abroad for earning money 5. to be old-fashioned.
let out - 1. to make a loud sound 2. to loosen a piece of clothing 3. to take money from somebody for a rent. 4. to set somebody free