Correct Option: C

calm (Adjective) : not excited, nervous or upset
anxious (Adjective) : feeling worried or nervous; wanting something very much
fearful (Adjective) : nervous and afraid ; terrible and frightening; extremely bad
worried (Adjective) : thinking about unpleasant things that have happened or might happen and therefore feeling unhappy and afraid
concerned (Adjective) : worried and feeling concern about something; interested in something