According to Brainly "Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest." Based off of this we can conclude that Moderators choose Certified answers and in order for you to have a certified answer it must be true and correct.
Hope I helped
