Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions

Online shopping can certainly be an awesome way to go. No lines, no traffic, no crowds of people. But is online shopping safer?

Experts says that online consumers may now be better protected than traditional shoppers, especially if they follow a few useful tips. First of all, make sure that you are on the site of a real company. Some thieves have created websites that look like the real one just to get your information and money. The best way to check if a site is real is to look for the “s”, which stands for “secure”, in the “https” part of the website address bar. Another indication of a safe website is a special icon in the shape of a padlock which you can find on the browser bar. And it is better to shop with online companies that you know and trust.

Secondly, make sure your computer has a firewall and up-to-date antivirus software. Updating your software is one of the easiest things you can do to stop hackers from attacking your system and protect your personal information. Moreover, beware of links to deals that are too good to be true on social networking sites. If you have doubts, contact the sellers directly. Finally, keep the details of your purchase in a safe place. Save or print the receipt, your order confirmation number and the tracking number. If you have a problem with the order, this information will help you solve the problem quickly.

The word ‘beware’ in the last paragraph is closest in meaning to ______________.