That which is a good first step to overcoming this setback is: c. Marco can ask other students how they are managing the coursework load.
A setback is a challenge that prevents a person from attaining a goal. The first step that Marco can take to overcome the setback that he faced is to find out how his fellow students are dealing with the challenge.
When he applies the suggestions from them, he might find them useful in overcoming the challenge that he has.
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