To get a sense of your digital footprint, you should: question 2 options: google yourself regularly, and monitor what your friends post, in case they've posted something about you google yourself once a year google yourself every five years delete all of your accounts and start fresh

Let us examine the given answers.

a) Google yourself regularly, and monitor what your friends post.
  Verdict: This answer is correct, but it is also necessary to look for yourself on other search engines.

b) Google yourself once a year
  Verdict: Once a year is better than doing nothing, but more than once a year is preferable.

c) Google yourself every five years.
  Verdict: The time interval is too long. Your reputation could easily be damaged, or your identity could be stolen in less than 5 years.

d) Delete all your accounts and start fresh.
   Verdict: This will not solve the problem of having your reputation damaged, or having your identity stolen. Information on the web is preserved ins storage vaults for long periods of time.

 
Google yourself regularly, and monitor what your friends post. Also, search for your name on other search engines.

The answer is rom or read only storage devices