Which factor most contributed to the cultural diversity of the Ottoman Empire

Which term describes a possible explanation of, or answer to, a scientific question that is based on prior knowledge or research and that is testable?

"would you like to hear mademoiselle reisz play? " asked robert, coming out on the porch where she was. of course edna would like to hear mademoiselle reisz play; but she feared it would be useless to entreat her. "i'll ask her," he said. "i'll tell her that you want to hear her. she likes you. she will come." he turned and hurried away to one of the far cottages, where mademoiselle reisz

Na test of the effects of sleep deprivation on problem-solving skills, research participants are allowed to sleep either 4 or 8 hours on each of three consecutive nights. this research is an example of: a)naturalistic observation. b)survey research. c)a case study. d)an experiment. e)correlational research.