5. What factors contributed to
Russia's war difficulties?

Explanation:

The Russian army was always short on the supplies needed for war, including food, guns, and ammunition. This was caused by the lack of industrialization in Russia along with the Central Powers' control over travel routes, making it difficult to receive shipments of supplies.

short on food and supplies like guns and ammunition and lack of indusrtrilization

Explanation:

i think u are supposed to write a long-essay answers to the long-essay questions

i believe the correct answer is option b. most eastern european nations joined nato.

though i could be wrong, option d. the eastern european nations were granted complete independence, would be another choice.

hope this ! : )