Answer:
correlational research
Explanation:
According to my research on different types of research methods, I can say that based on the information provided within the question the research methods that is likely to be most appropriate is a correlational study. This is because a correlational study is a method that focuses on testing and analyzing how a change in one variable affects another variable. Which is exactly what Al wants to determine.
I hope this answered your question. If you have any more questions feel free to ask away at Brainly.