Correct Option: A

soothing (Adjective) : affording physical relief; freeing from fear and anxiety
exasperating (Adjective) : extremely annoying; infuriating
successful (Adjective) : achieving your aims or what was intended; having become popular and/or made a lot of money annoying (Adjective) : making somebody feel slightly angry; irritating
distressing (Adjective) : making you feel extremely upset because of somebody’s suffering