A、After-sale service. B、Opinions posted online. C、Lower prices. D、Reliable delivery. B文中Nielsen说到，消费者尤其在购买化妆品、汽车、软件和食品的时候，很看重评论。

Asia-Pacific consumers are the world’s most active online shoppers and many rely on Internet reviews when making purchases, research firm Nielsen said this week.
    The firm said 35 percent of consumers in the region used over 11 percent of their monthly spending to make online purchases, compared to a global average of 27 percent of consumers. (26) South Koreans were the heaviest online buyers in Asia, with 59 percent directing more than 11 percent of their monthly spending to online purchases,followed by 41 percent in Japan,Nielsen said in a report. A further 31 percent of Asia-Pacific consumers used 6 to 10 percent of their monthly shopping purchases to buy items online.
    More Asia-Pacific consumers also intend to buy online in the next six months than those from other regions, with South Koreans and Japanese the most likely to make such purchases. Among the purchases consumers in the region are likely to make in the next six months are books, clothing, shoes, airline tickets, electronic equipment and hotel reservations.
     (27) Nielsen said opinions posted online were important in customers’ decisions to buy products such as cosmetics , cars, software and food. Asia-Pacific consumers were also the most likely to share dissatisfaction at a product on the Internet compared with consumers elsewhere. (28) " The increasing accessibility of the Internet and the incredible popularity of social media and online discussion forums mean today’s brands have nowhere to hide," said Megan Clarken,Asia-Pacific managing director at Nielsen’s online division. Nielsen said that social media such as Fa-cebook and Twitter or blogging sites had become powerful tools influencing what people buy and urged businesses to embrace the trend.
26. What do we learn about Asia-Pacific consumers?
27. Which is important when customers decide to buy products according to Nielsen?
28. What does Megan Clarken mean?