Question #59 An engine manufacturer is testing the effects of two fuel additives and two exhaust temperatures on engine wear. A researcher performs a 2" factorial experiment, replicated twice. Two different engines are used in the test, so the experiment is blocked for the two engines. What is the rationale behind blocking in this experiment? A) To decide which of the two engines has the lowest wear B) To account for unwanted variation caused by different conditions in the two engines C) To detect other factors that affect engine wear D) To ensure that the runs are completely randomized