Direction : Read the passage given below and answer the questions that follow by selecting the most appropriate option :

Online social networking via mobile phones and computers is a global revolution. Around a billion people worldwide use networking to stay in touch with friends, to share videos and photographs and to exchange information. But, if you are using networking in this way, you should be aware of the risks that exist.

Social networking is such that most of the extensive numbers of users are unknown to you. This carries a degree of risks. Once a message, video or photo has been shared online, it is out of your hands because you can't control where it goes. This means that you may be sharing your personal information with people you do not know and who may not be trustworthy.

Some vital points to consider in order to reduce risks, when using social networking include keeping personal details private; thinking carefully before posting, chatting, uploading or downloading and using privacy settings to restrict strangers accessing your information.