What is the goal of retrospective case-control designs?

a) To draw inferences about how an antecedent condition varies within particular groups
b) To draw inferences about how an antecedent condition will influence future outcomes
c) To draw inferences about an antecedent condition that is separate from the outcome
d) To draw inferences about an antecedent condition that has resulted in or is associated with the outcome

Correct Answer: d