All children who are 5-years-old will, by definition, have a mental age of five

Dr. Edwards wants to show a causal relationship between tobacco smoking and cancer. Dr. Edwards should:

a. conduct a telephone survey asking smokers about their health b. conduct an experiment using animal participants c. observe people smoking d. find correlation between smoking and the rates of cancer

According to Freud, the last psychosexual stage, the genital stage, is reached at ______

Fill in the blank with correct word