Answer:
Muscles, option C
Step-by-step explanation:
The term 'polymyositis' can be broken down into three components: the root phrase 'poly-,' the root phrase 'myos/o-,' and the suffix '-itis.'
The root phrase 'poly-' comes from a Greek word and means many, multiple, much, or more than one.
The root phrase 'myos/o-' comes from a Latin word and means muscle.
The suffix '-itis' indicated inflammation of an anatomical structure or region.
Together, this word means inflammation of many muscles, making option C the best answer choice.