This type of auto-immune disease occurs when the immune system attacks the layer of insulation that surrounds the nerves and slows nerve impulses.

A. asthma
B. allergies
C. multiple sclerosis
D. rheumatoid arthritis

And your answer is?

I have no clue

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immune system attacks the layer of insulation that surrounds the nerves and slows nerve impulses

The correct answer is C. multiple sclerosis.

To arrive at this answer, we need to understand the description provided in the question. The immune system attacking the layer of insulation surrounding the nerves and slowing down nerve impulses is a characteristic symptom of multiple sclerosis. Let's go through the other options and rule them out to be sure:

A. Asthma: Asthma is a respiratory condition characterized by inflammation and narrowing of the airways, leading to difficulty breathing. It does not involve the immune system attacking the layer of insulation around the nerves.

B. Allergies: Allergies are a hypersensitive immune response to a substance that is normally harmless. They commonly manifest as sneezing, itching, and watery eyes. Allergies do not involve the immune system attacking the layer of insulation around the nerves.

D. Rheumatoid arthritis: Rheumatoid arthritis is an autoimmune disease where the immune system mistakenly attacks the joints, causing pain, swelling, and stiffness. It does not involve attacking the layer of insulation around the nerves.

Therefore, the correct answer is C. multiple sclerosis, as it matches all the given symptoms.