If everyone in the population has an equal chance of inclusion in a study, then one would say that the study used a Random sampling technique for the study. (Option A.)
The way in which we select a sample of individuals to be research participants is critical. Random sampling makes sure of the population which has to be random and need not be pre determined . The procedure we plan to implement will determine if we are biased or not , if the people know each other or not etc.
the quality of being made up of exactly similar parts facing each other or around an axis. it helps art look precise and exactly the same on both sides