Steven is a 6-year-old boy who is having trouble in school. He meets several of the diagnostic criteria for attention-deficit/hyperactivity disorder; however, you do not have enough information at this time to give a firm diagnosis. In such cases, what specifier can be used?

3, many invasions from the Ottoman Turks resulted in the rapid decline of the Byzantine empire, 450 AD to 1454 AD

4 Many plagues, brought over from the Turks erupted in citys like Athens and Constantinople, killing a good chunk of the Empire's population