The answer to this question is Longintudinal
Longintudinal research design is a tyoe of ressearch design that involved asking repetitive observations over same variables.
In a lot of cases, longintudinal research could take more than 10 years since the process is really long and repetitive.
Use this website it has good information
http://www.newworldencyclopedia.org/entry/Arabian_Peninsula
The answer to your question is,
D. All of the above are correct
-Mabel <3
