Comma sense would be the best answer.
Answer:
Russia's withdrawal from the war allowed Germany to focus on its resources on a one-front war in the west.
Explanation:
Answer:
d is the answer hope this helps
The sentence that contains a verbal phrase acting as a modifier is: Giving a presentation in front of my class, I suddenly developed sever stage fright.
Modifiers are optional elements in a phrase structure that even when removed, it does not affect the whole grammar of the sentence.