The Answer is A.) Cytoplasm
They needed to create a unique name that would be recognized as belonging to one organism. Hope this helps! ;D
The main term of reference in the index is Aneurysm
Extra cranial carotid artery aneurysms ruptures when the blood clots are formed in them. The term aneurysms is a disease that is happening due to the weakness in the wall of artery. The weakened arteries widens out or swells.