What must be done to avoid plagiarism when including a direct quotation in a research paper?
the source must be about the same topic.
the source must be properly cited.
the content must be rephrased.
the content must be free of bias.

The source must be properly cited.

Explanation:

If the source is not properly cited, it can be considered plagiarized work.

the real gdp increased by 4.1%

explanation:

might not be right, i think i'm correct, but i might be thinking of last quarter

this means that germany had to pay the allied countries. reparations are/is essentially payment for something that they have done wrong, so after ww1, germany was forced to pay reparations so they could replenish the allied countries resources' that they had lost during the war.