B. got out
Feedback let up - 1. to become less severe 2. to make less effort.
keep in - 1. to make somebody stay in hospital because of their health 2. to make somebody stay at home as a punishment.
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.
go at - 1. to argue 2. to start doing something eagerly