C. settle down
Feedback wash off - 1. to clean something using water 2. if something washes off it means it can be removed with water.
pull off - 1. to succeed 2. to stop a vehicle or to turn into a smaller road.
talk back - to speak to somebody disrespectfully.
settle down - 1. to become quiet or make somebody quiet 2. to start leading a quiet life 3. to concentrate on a particular activity