<u>Answer:
</u>
The study carried out by Dr. Xu is a randomized controlled study.
<u>Explanation:</u>
- For the sake of determination of how the results of the students change by doing certain changes to the examination pattern, Dr. Xu devised that the change is considerably evident.
- Dr. Xu provided and intervention in the process of exam in the form of guides which helped the students to score better later. Hence, from the standard of conduct of the study, it can be said to be a randomized controlled study.
Answer:
Atlas Mountain range
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The name of the one and only mountain range found in northern Africa is, in fact the Atlas Mountain range.
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Hope this helps!
1) Turkey
2) Russia
3) Kazakhstan
Hope that helped. There are also a couple more, but you only asked for 3, so there you go!!! ;)
<em>D.All government officials.
</em>
<em>HOPE IT HELPS!! SMILE!!</em>
