What part of a scholarly journal article should you read to get an overview of the research to determine if you want to read the entire article?

The medical director (a doctor) of a nursing care facility observes that patients seem to be livelier after doing physical activity. She decides to create a regular exercise class for all residents and recommends it to them as part of her specific medical advice. She plans to observe whether patients will become livelier over the long run. This is an example of:

A. Experimentation B. Ethnography C. Stimulation D. Investigation

How many senators are elected from each state?

a. Four b. Two c. It depends on a state's population. d. One e. The same number as the state's electors in the Electoral College