Correct Answer: A

Rationale: During the investigation of an epidemic, establishing the epidemic involves comparing the current frequency of the disease with the typical frequency for that time of year in the community. This comparison helps determine whether an epidemic is occurring by assessing if the number of cases exceeds the expected baseline, as well as establishing the link between the cases of the disease.

Correct Answer: D

Rationale: Tertiary prevention focuses on actions taken to prevent complications and further deterioration among individuals already diagnosed with a disease. It is implemented during the terminal stage of a disease when efforts are made to prevent disability, restore function, and improve quality of life. This stage is crucial for managing the disease's progression and enhancing the patient's well-being.

Correct Answer: C

Rationale: In the context of a patient in labor developing a complication, it is essential to refer them to a Municipal Health Officer. While a public health nurse and rural health midwife can provide care during normal childbirth, a physician, such as the Municipal Health Officer, should attend to a woman with a complication during labor. Therefore, the correct choice is the Municipal Health Officer as they are trained to handle complications that may arise during childbirth.

Correct Answer: B

Rationale: Analytical epidemiology focuses on studying factors or determinants that affect the patterns of disease occurrence and distribution in a community. In this scenario, the nurse is analyzing various factors contributing to the high mortality rate due to heart diseases, which aligns with the principles of analytical epidemiology.

Correct Answer: B

Rationale: