Final answer:
Experimental design is the research design that has the goal of determining a cause-and-effect relationship.
Step-by-step explanation:
The research design that has the goal of determining a cause-and-effect relationship is experimental design. Experimental design involves conducting controlled experiments where two groups, the experimental group and the control group, are designed to be the same except for one difference, which is the experimental manipulation. The experimental group receives the experimental manipulation, while the control group does not.