Answer:
He says do not be a troublemaker.
Explanation:
What advice does Obama give for students to achieve their goals? Do not become a troublemaker or else you will never achieve your goals. Work as hard as you can so you can be rich and successful.
Both reactivity and electronegativity decrease down a group.
I'm assuming this is multiple choice...
DO IT YOURSELF UGH NOT THIS WAY
the answer is C. hope this helps