Final answer:
Lana may have felt more comfortable admitting her alcohol consumption in writing on the health questionnaire, but did not want to discuss it in person with Koby.
Step-by-step explanation:
The best explanation for why Lana did not admit to drinking alcohol when Koby asked how things were going is that people will acknowledge issues in writing that they will not in person. This means that Lana may have felt more comfortable admitting her alcohol consumption in writing on the health questionnaire, but did not want to discuss it in person with Koby. This could be due to a variety of reasons, such as fear of judgment or discomfort with the topic.