Which rank of study design correctly shows the strong to weak causal evidence ?
选项：

A:Randomized controlled experiment, single-group time series experiment, multi-group time series experiment, no control before and after comparison experiment;
B:Randomized controlled trial, case-control study, case-control study nested in a cohort,ecological study;
C:Prospective cohort study, case-control study nested in a cohort, case-control study, cross-sectional study;
D:Historic cohort study, prospective cohort study, case-control study, cross-sectional study