Base your answer to the following question on the passage below and on your knowledge of social studies.

Observations of a Soldier in WW1
Private Archie Surfleet, February 8th, 1918-We have been in camp near the wood at Ecurie for some days now and a more miserable existence it would be hard to imagine. There is nothing but unrest and uncertainly and everyone here is absolutetly fed up to the teeth.
-Malcolm Brown, Tommy Goes to War

Which hypothesis can best be supported by this passage?
(1)Allied forces were on the verge of winning the war.
(2)Technology had created a military stalemate.
(3)Revolution in Russia hastened the end of the war.
(4)Conditions contributed to low troop morale.