In a previous correlational study, Dr. Lafayette has found that owning dogs is associated with lower levels of daily stress in a sample of returning war veterans.
Which of the following would constitute a shift from theory-testing mode to generalization mode?

A) Conducting a study on the same sample of war veterans, this time using a different measure of daily stress.
B) Conducting a study examining the stress reduction in dogs.
C) Conducting an experimental study in which he assigns people to own a dog or not.
D) Conducting a study using a sample of elderly participants from a local retirement home.
E) All of the above would be studies done in generalization mode.