C. Phobias are irrational fears about something. They are "irrational" because a person may fear something that would not logically pose any real threat or harm, such as fearing small spaces (claustrophobia) like elevators because one might feel like they are suffocating, even though elevators obviously do not cause people to suffocate.
<span>An expert is someone who expends the least amount of energy for the greatest result.
We call a person an expert if he performs really perfectly as compared to the newcomers because he is highly trained and professional and has the abilities to a specific art. Expertise is usually measured on the basis of intelligence and activeness together. Experts can never be seen unconfident in doing their job.
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I believe the answer is D., metastases.
