The correct answer is
<span>D. "So-called anonymous tracking is not very secure-the anonymity is fairly easily broken. Cracking [it]...is a fairly easy engineering feat.</span>
The sentence that uses a gerund phrase as a predicate noun is: My job is leading people to their seats in the auditorium. The gerund phrase used in this sentence is "leading people to their seats" and this is used as a predicate noun.
I don't believe a or b is the answer so i would eliminate those 2
Morrie wants teacher to the last printed on his tombstone