Spartan troops conquered the city of Messian and turned it's conquered people into non-free laborer a. The Messerians were forced to raise crops for the Spartans. This captive work force freed Spartan men from farming chores.
The answer is B. and C., hope this helps (:
So you don't hurt yourself and it could possibly save the person's life
By employing randomization, manipulation, and comparison/control techniques, the researcher completely controls the circumstances and experiences of participants in an experimental research design.
<h3>What exactly is the experimental research design?</h3>
The technique of doing research in a methodical, controlled manner—known as experimental design—ensures that accuracy is maximized and that particular inferences about a hypothesis statement can be made. Typically, the goal is to determine the impact a factor, independent variable, or dependent variable has on another.
<h3>The importance of experimental research</h3>
The nature of the link between the independent and dependent variables can be ascertained by scientific experimentation. While it is frequently challenging or even impossible to control only one variable in an experiment, scientists frequently try to control as few variables as possible.
Learn more about experimental design: brainly.com/question/28139463
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