Question

So-called anonymous tracking is not very secure—the anonymity is fairly easily broken. Cracking open that anonymous shell and merging it with personally identifiable information from other sources is a fairly easy engineering feat.
Which of the following shows the correct way to omit part of this quote but maintain its meaning through an addition?

A. So-called anonymous tracking is not very secure...the anonymity is fairly easily broken. Cracking open that anonymous shell and merging it with personally identifiable information from other sources is a fairly easy engineering feat.
B. So-called anonymous tracking is not very secure—the anonymity is fairly easily broken. Cracking open that anonymous...is a fairly easy engineering feat.
C. So-called anonymous tracking is not very secure...[and] merging it with personally identifiable information...is a fairly easy engineering feat.
D. So-called anonymous tracking is not very secure—the anonymity is fairly easily broken. Cracking [it]...is a fairly easy engineering feat.