The correct option is B Responsibly
Facilities are a place, piece of equipment, or amenity provided for a particular purpose. It is divided into public facilities and private facilities. It is our duty to use any facilities with due care. As a responsible citizen, we must use facilities responsibly. We should not harm or destroy the facilities like bus, train, banks, schools, hospitals, gardens, post offices etc. These are given for our use so we should also respect it and use it carefully.