Aresearcher concludes that frustrating people by giving them a task that is impossible to complete causes them to behave more aggressively. only warrants this type of conclusion.

The correct answer is: Experimental research  

Explanation:

Experimental research is a technique or an experimental procedure research which is performed or conducted to validate or support a hypothesis. In this scientific approach, a particular set of variables are observed and measured by keeping other set of variables constant, as a subject of the research or the experiment.

industry had made the u.s. the richest nation in the world at this time. the second industrial revolution caused growth in industry and transportation, which allowed increased trade between nations. click to let others know, how is it

taking a bath requires the most water out of the given options because it takes a significant amount of water in order to fill a bathtub.