Well many russian soldiers were on the front during world war i most of those who remained behind responded to the february revolution by

Option C, joining the riots instead of stopping them.

Explanation:

The options that don't make sense are:  Options A, B, D

The option that makes sense is:  Option C, joining the riots instead of stopping them.

 Option C, joining the riots instead of stopping them.

a.tensions between the colonial elites and the backcountry men of virginia.