Which of the following sampling techniques is an equal probability selection method (i.e., EPSEM) in which every individual in the population has an

Which of the following sampling techniques is an equal probability selection method (i.e., EPSEM) in which every individual in the population has an equal chance of being selected?

a. Simple random sampling

b. Systematic sampling

c. Proportional stratified sampling

d. Cluster sampling using the PPS technique

e. All of the above are EPSEM