Which of the following is true according to the passage?

参考解析：

细节理解题。根据文章第四段第一句“Microplastics are any plastic debris less than 5mm in length, while nano plastics are less than 100 nanometers.”可知，微塑料是长度小于5毫米的塑料微粒，而纳米塑料是长度小于100毫微米的塑料微粒，排除A选项；根据文章第六段最后一句“The average European consumes 0.8kg of tea per year, according to Statista in 2019, creating a market worth an annual $22.3m.”可知，2019年统计网站Statista的数据显示，欧洲人平均每年摄入0.8千克的茶叶，每年的市场价值达2230万美元（约合人民币1.6亿元），B选项正确；根据文章最后一段“The scientists note that more research is needed to determine whether the plastics’ effect on humans is negligible, subtle—or chronic”可知，科学家指出，还需要进行更多研究才能确定微塑料对人类的影响是可以忽略的、微妙的还是长远的，排除C选项；根据文章第七段第一句“and they have previously been detected in tap water, bottled water and some foods, not much is known about the possible health effects to humans of ingesting microplastics”可知，过去也曾在自来水、瓶装水和一些食物中检测到微塑料，但是科学家对于人类摄入微塑料对健康带来的影响知之甚少，排除D选项。故选B。