Passage 3
E-commerce websites are now a well known concept among all net users. Every net surfer has come across or used services of e-commerce sites at some point. Customers always prefer websites that offer them secure transactions at the time of payment. As the instances of online credit eard theft and hacking have increased, so is the need for installing secure and reliable mode of online payment.
In any given e-commerce design package three things are most important-user friendliness, extended features and quality. E-commerce can help your e-business achieve greater heights and profits with the help of many features.
19.According to the writer, nowadays all net users are familiar with the concept of ______.
A、mode of online payment
B、design package
C、e-commerce websites
D、user friendliness
【正确答案】：C
