Answer:
D. stronger on reliability and stronger on validity.
Step-by-step explanation:
Qualitative methods, while good at explaining certain things, such as personal motivations, or in psychology, underlying incentives, impulses, and feelings, are considered unconclusive in research. This means that qualitative methods lack enough reliability and validity to allow for the development of scientific conclusions.
Surveys, on the other hand, are quantitative methods, and as a result, they are both more valid and more realible. A well-made suvery, with a large-enough sample, and a appropriate statistical study, can result in conclusive, scientific statements.