A. case study: loss of feeling samuel awakes one morning with weakness on his right side he is a bit confused, see his double, and his speech is slurred

Stroke.

Explanation:

When it comes to symptoms, it's obvious something is not right. In this case, Samuel is suffering from stroke. When does stroke happen? When our brain doesn't get enough oxygen and all the nutrients. When that happens, cells begin to die faster and faster. Some of the symptoms: slurred speech, understanding what others are saying, feeling of numbness in face, arms, legs, sight problems in one or both eyes, troubles with walking, headache.

answer; /// i believe the answer is (phenylketonuria);