Answer:
site A would have 3200 total memebers and site B would have 2600 by month 6. A gained more
Explanation:
a: month 5 is 1600 and month 6 is 3200 so the difference is 1600 between 5 and 6
b: month 5 2100 and month 6 is 2600. theres a 500 difference