The answer is All of the above
Answer:
A repeated-measures design
Explanation:
This is a research design that is used to measure the same variables repeatedly on the same sample or subject over a given time frame or over different time periods and/or under various conditions.
Answer:
Communicable diseases remain a major global public health threat worldwide. For example, malaria and HIV/AIDS are mass killers, with the populations in poor countries being hit the hardest.
Explanation:
