Premise: Teenagers with advanced programming abilities in FANTOD used it to hack into ETS and change their own SAT scores.
Conclusion: The responsible individual for the hacking were convicted, hence, colleges have discounted the official SAT scores of applicants with these convictions, and have required them either to retake the SAT under more secure conditions or to take special admission tests, with difficulty levels similar to the SAT, in supervised conditions on their own campuses.
Now, we want to look for the option to most logically complete the student advocates' claim.
Option A - Incorrect
In reference to the passage, we can't know if some of the students have decided to take the colleges' special admission test instead of SAT. Therefore, we do not know if they might find the admission test easier than SAT.
Option B - Incorrect
This claim is irrelevant to the argument because the completion time of the admission tests wasn't stated.
Option C - Correct
This is true. If they retake SAT or admission tests, it gives an unfair advantage to other students because some of these teenager hackers already changed their friends' scores due to the access they dad into ETS to change their own score.
Option D - Incorrect
This is out of context as regards this passage. Also, the passage didn't specify if these teenager hackers belong to the same school.
Option E - Incorrect
This is not related to the argument, and as such, it's invalid.