2. What is one potential disadvantage of using mobile phones? A. They can be too expensive. B. They can make people less social in person. C. They can be used to access inappropriate content.

Обоснование: В тексте говорится: "However, some people would argue that it has a negative effect on our life. They say it can be distracting and make people less social." Это напрямую указывает на вариант B как на недостаток. Варианты А и С не упоминаются в тексте как недостатки.

Ответ: B