The ultimate responsibility for ethical research lies with the

In 1773, the Sons of Liberty in Boston created a man-made crisis in order to push away the possibility of reconciling with Great Britain. Their action has been referred to as ______ by historians.

a. the Boston Massacre b. the Boston Rampage c. the Boston Tea Party d. the Boston Uprising

In an experiment, what provides a good estimate of the counterfactual?

A. experimental treatment B. before and after design C. randomized comparison groups D. selection bias