Dr. davenport wants to conduct a study of whether high-school students learn more efficiently while seated at a desk compared to in an easy chair. she knows there is a large research literature regarding similar influences on learning, and she wants to see if the findings hold true with a group of high school history students. moreover, as a researcher she is uneasy with a lack of structure. you recommend that dr. davenport conduct a study.

Quantitative study is the correct answer.

Since Dr. Davenport is an uneasy with a lack of structure researcher, she should conduct a quantitative study. A quantitative research gathers data  numerically and these numbers can be put into categories that can be easily used to create tables and graphs. Doing so, it would be easier for her to visualize the most efficient approach to an efficient students' learning.  

in 342 bc j._c. egypt fell into the hands of the persians, under the reign of nectanebo ii

greek city-states unite in a revolt against the persian empire at the beginning of the fifth century bc. j.-c  

from the year 660 or 659 bc ad, cyrus preached the revolt against the medes to deliver the persians.