To improve your mental health, you should dwell on disappointments
reject most criticism
focus on your strengths
ignore your mistakes

Focus on your strengths

Explanation:

You shouldn't dwell on your disappointments, because it isn't healthy for your mental health. You shouldn't necessarily "reject" most criticism either. Furthermore, ignoring your mistakes aren't that healthy either, you should embrace them and move on. So, focusing on your strengths would improve your health.

i believe it is the last one. im sorry if im wrong!

answer; i do believe the correct answer is (25) times faster;