She chooses to leave the building because she recognizes the futility of her effort, since she has gone, on behalf of the company representatives, to the Gestapo headquarters in order to bribe one of the officers (Karl S.) but to no avail. Since the Austrian officer "was like stone," and since she has even tried to talk to his boss, also in vain (and risking her life), she does not see other option but to leave the facility.
Answer: This is a guess, but possibly to match the scenery/imagery of the scene
Explanation: since the author is pointing out many tropical details, such as coconut white, mango yellow, or children jumping into waves, the author is driving more interest into there piece by saying cactus fence instead of just fence. Again, just a guess.
Answer:
The answer is letter A = that it's a sentence that will show them a difference.
