4.
The answer is: B
Explanation
The correct option is B: Whoever.
The sentence describes a situation where the identity of the person or group winning the civil war is unknown, and the focus is on the fact that there will be little rejoicing regardless of who wins. "Whoever" is used to refer to any person or group who wins the war, emphasizing that the outcome will not bring much joy no matter who the victor is.
The other options do not fit the context as well:
"Whichever" refers to a specific choice among a known set of options.
"Whatever" refers to anything or everything, which is not suitable for referring to people.
"Wherever" refers to any place, which does not fit the context of the sentence.