Answer:
<em>This virus genome synthesizes 75 genes encoding for known proteins. Among them, 69 genes are found to exist in a single copy and three genes in two copies each </em>
Hope this will help if not so sorry :)
In ancient times, mountains were used as a natural barrier (used for protection) from the weather and neighboring countries. They're neighboring countries may go into a "great depression" and seek for new natural resources. They may acomplish this by attacking near by villages, but if you were on the other side of the mountain from them, you were safe since it is very long and dangerous expedition.
1.China
2.India
3.United States
and the 4th if you want it is Indonesia