C. putting in
Feedback make out - 1. to see/hear/understand 2. to pretend 3.succeed in something 4. to write check 5. to kiss someone passionately.
pick over - to examine a group of things in order to select the items you want. wash away - 1. to be carried away by liquid 2. to get rid of sad feelings.
put in - 1. to install 2. to make efforts 3. to interrupt somebody by inserting a remark