Final answer:
Mr. Kraler has a hospitalising ulcer, upsetting the people hiding with Anne Frank as he is their crucial link to the outside world. Their ration book supplier, Mr. Koophuis, has suffered a concussion, threatening their access to food and supplies.
Step-by-step explanation:
The upsetting news about Mr. Kraler in 'The Diary of Anne Frank' is that he has been hospitalised due to an ulcer. Anne and others hiding with her deeply worry about him, knowing that he is a crucial link for them to the outside world. For their ration book supplier, Mr. Koophuis, the alarming news is that he has a concussion after falling down the stairs. Anne's group relies on him for ration books which allows them to get food and supplies, so his shake-up is a severe concern for them. This illustrates the enormously precarious and stressful situation they're in, dependent on others' wellbeing for their survival.
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