I think the answer is 100 per so C. hope it helps hanna
Vaccines and shots are typically made of a small controlled portion of the virus or disease to cause immunity to the large scale types.
I think it’s because you have trouble breathing
Blood flows to the brain through the internal carotid and vertebral arteries and away from the brain through the internal jugular vein. The internal carotid artery supplies the brain, while the external carotid nourishes other portions of the head, such as the face, skull, scalp and the meninges. The vertebral arteries provide supply to the upper spinal cord, brainstem, cerebellum, and the posterior part of the brain.