I would say C, schizophrenia,
because schizophrenia is "a mental disorder that in many ways centers around not recognizing what is part of reality – namely, having psychotic breakdowns." It is not related to anxiety, as anxiety is classified as "neurotic" while schizophrenia is classified as "psychotic".
Communication. When you communicate with someone you talk to each other. However if you are listening to someone's problems and helping them through something by sharing feelings this can also be caring, so it's up to interpretation.
Answer: About 40 percent. Majority of the toddlers often go to a head start or something and start to learn and memorize these things.
D. Glycogen
this form of glucose is made up of many connected glucose molecules called glycogen.
The answer is 2000 calories. My guess is that is because you need to burn so many but gain so many to get energy. This is a way to not gain weight.