A study was conducted to determine which school meal ought to be removed from the weekly rotationEvery student in the school was asked to rank their top three school lunches. Tuna melts were found to be the least-favored option , with only 7.8 percent of students ranking tuna melts in their top three choices. Which of the following accurately differentiates whether this is an example of an observational study an experimental study, or a survey? (1 point) This is a survey since opinions were collected This is an experimental study since a treatment was applied to the test subjects This is an observational study since it included random sampling This is an experimental study since a cause-and-effect relationship can be inferred