Exactly 15 articles contained false information.
In order to find this, you simply have to multiply the number of total articles by the rate of fake articles.
60*.25 = 15 articles
0.8 - 89 * (-89) * 3 is 23763.8
23 over 90 and if I got it wrong, sorry
Option A: drop of 8 meters would be correct because a drop in this case indicates something has been removed. -8 equals 8 below 0.