Task: Class Definition Understanding (ontology: Sciences/Biology)

Which of the following definitions best describes 'ansa cervicalis'?

A. The any of the paired peripheral nerves formed by the union of the dorsal and ventral spinal roots from each spinal cord segment[MP,modified].
B. A loop of nerves that are part of the cervical plexus that lies superficial to the internal jugular vein in the carotid sheath. Branches from the the concept innervate three of the four infrahyoid muscles, including the sternohyoid muscle, the sternothyroid muscle, and the omohyoid muscle.
C. Rami communicans (plural the concept) is the term used for a nerve which connects two other nerves. When used without further definition, it almost always refers to a communicating branch between a spinal nerve and the sympathetic trunk. More specifically, it usually refers to one of the following: Gray ramus communicans White ramus communicans.
D. A nerve that is part of the trunk region of the body (not to be confused with a nerve trunk).

Answer: A loop of nerves that are part of the cervical plexus that lies superficial to the internal jugular vein in the carotid sheath. Branches from the the concept innervate three of the four infrahyoid muscles, including the sternohyoid muscle, the sternothyroid muscle, and the omohyoid muscle.