▲閱讀下文，回答第 46−50 題
      Have you ever heard the phrase “Big Brother is watching you” ? The twenty-first centuryhas seen an increase in the chances of being watched or monitored, that is, an increase insurveillance, in our daily lives. People are getting used to being monitored by cameras, havingprivate messages inspected at work, and having conversations recorded by banks or otherbusinesses. Surveillance can be a form of monitoring via electronic devices, such as securitycameras, or via Internet interception, such as email monitoring. Whether surveillance is usefulfor society is the current focus of public debate. For those who support surveillance, they thinkit helps to protect social security, while for those who disagree with it, they worry about someissues regarding how surveillance can be regulated.
      For supporters, surveillance can be helpful for the authorities to gather information, preventcrimes, and protect citizens. They argue that surveillance is very important in terms of trackingcriminals and terrorist activities. With the help of surveillance tools, information can be sentdirectly to a facial recognition system. This can, for example, automatically recognize suspectsand direct the police to their location.
     Nevertheless, for opponents, surveillance can be considered an invasion of privacy. For thisreason, human rights activists have argued against it. When the purpose of surveillance is usedmainly for monitoring, they have expressed deep concern that the society may turn out to be amass surveillance society, with limited or even non-existent freedom. For instance, people maynot have anything to hide when they are monitored by cameras. The authorities could makepeople obey the rules based only on what they have seen from the cameras without asking foropinions or permissions.
46. What is the best title for this passage?
(A) The Benefits of Surveillance
(B) The Definitions of Surveillance
(C) The Inventions about Surveillance
(D) The Arguments about Surveillance