D. knocked off
Feedback calm down - to become patient and not angry.
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 up - 1. to become less severe 2. to make less effort.
knock off - 1. to stop working and go out 2. to reduce price 3. to make 4. to kill 5. to steal