In a test of the relationship between exercise and mood, one group of participants is subjected to a 1-hour aerobics workout in a room with windows, and a second group of participants is assigned to a room without windows to watch a video of people exercising for an hour. The researcher finds that people in the aerobics class rate themselves as happier than those in the video viewing condition. What can we conclude from the study?

That it could be exercise and the presence of windows that impacted mood.

Explanation:

According to a different source, these are the options that come with this question:

In this experiment, one group received windows and exercise, while the second one received no windows and a video. After the conclusion of the experiment, the first group appeared to be happier. As there are two different variables that changed between the two groups, it is not possible to determine with one caused the happiness. Therefore, it could both be exercise and the presence of windows that impacted mood.

the fourth amendment protects:

"the right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no warrants shall issue, but upon probable cause, supported by oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized."  

so this would mean the denial to search and seizure without warrant or permission.