That you've been all around the world multiple times
C is the complex sentence because it contains the word while and an independent and dependent clause! :)
Answer:
partisans
Explanation:
partisan is the name given to loyalits
"Derm" = skin.
So, when you are going into this field to practice skin diseases and treatment, the word you're looking for is a <u><em>dermatologist. </em></u>
A dermatologist <em>is a special doctor that manages diseases within the skin, hair, and nails. </em>