D. When you set a goal, you want it to be difficult but realistic. For example, if you are not very good at running, you maybe want to set a goal like "try to run 1 mile without getting tired this month". This is a difficult goal to reach, but it is realistic. If you had said "Run 100 miles without getting tired this month", this is unrealistic because you are not very fit hope this helps:)
D because to reach your goals they she be set to be a little difficult so that there is some work but not so high that it would be impossible to reach.
A breakfast high in fiber and protein – at least five grams of each – will provide a sustained release of fuel to your body and brain and help to improve concentration and energy levels.