Dr Henry Conducts an Epidemiological Study to Assess the Lifetime

Dr. Henry conducts an epidemiological study to assess the lifetime prevalence of schizophrenia in the United States. Dr. Henry is assessing ____.

A) the likely causes of schizophrenia in the population as a whole
B) the number of people in the United States who have had schizophrenia within a certain period of time
C) the percentage of people in a population who have schizophrenia during a given interval of time
D) the age of onset for people in the United States who have schizophrenia