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Answer:
factual information
description of how events unfolded
rhetorical questions
Techniques can be applied when developing a text so that it has a certain feeling or information conveyed to the audience. The elements that the author uses in this passage to support his primary purpose are;
- Factual information
- Description of how events unfolded
- Rhetorical questions
In this text, the author describes in detail the efforts that the U.S. put in to ensure that their efforts in the warehouse were not discovered by the Soviets.
Rhetorical questions were also used to stress ideas.
The information revealed is also factual for it describes what actually happened.
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https://brainly.com/question/2183813