V. Reading Comprehension 10%(閱讀文章後選出最正確的答案)    Nowadays people frequently use computers and smartphones to surf the Internet. As they go on the Internet chatting, shopping, gathering information, or making new friends—they leave behind them a trail of activities that show their lifestyles, habits, locations, and preferences.   Many people think it is free to look for information or connect with friends online—but is it really free? In fact, they are paying with a new kind of money—privacy. As people visit the websites, hundreds of pages of data about them are thus collected, stored and sometimes shared with other people.   Some may think, “So what? Who cares if my online activities are collected by other people?” However, these information is very valuable to advertisers (廣告商), who want to target ads at certain types of potential (有潛力的) customers . What is worse, some hackers may even make use of it to commit crimes (犯罪). To sum up, it is best to assume that nothing is really private on the Internet.
【題組】46. The word trail in the first paragraph is the closest in meaning to “________.”
(A) style
(B) space
(C) crowd
(D) record