I believe it is known as the "margin of error" (B). Hope this helped!
These are the 6 insurgent strategies:
1. Urban
2. Military focused
3. Protracted popular war
4. Identity focused
5. Conspiratorial
6. Composite and coalition
The best answer to your questions seems to be #1: Urban insurgency.
Answer:an adverb is a word that modifies a verb, adjective or another adverb, or sometimes a whole clause/sentence. It generally answers the question how? where? or when?
Some Examples:
yesterday (when?)---modifies the verb "arrived"
cautiously (how?)---modifies the verb "walked"
very (how?)---modifies the adverb "cautiously"
I hope I helps you.