The advantages of research based on field experiments are:
A. A strong external validity
B. Subjects behave normally and naturally.
C. The experiment takes place in a natural setting.
D. Generation of primary data
E. Non-requirement of elaborate logistics
Choose the correct answer from the options given below:
1
A, B and C only
2
B, C and D only
3
C, D and E only
4
A, C and E only