Aschedule is useful for
a. visualizing all your commitments
b. solving workflow problems
c. maintaining your responsibilities
d. all of the above

Option D. All of the above

All the choices have a good effect to have a useful schedule. Visualizing all commitments yield to a positive effect towards other people whom we are dealing with. If we have a planned schedule, some problems we might encounter in our school or other related matters will result positively because we carefully scrutinize some plausible issues might affect along the way.

Having a planned and good schedule will surely maintain our responsibilities, as we visualize the pros and cons of a particular situation. 

The answer is all of the above.
A schedule is useful for Visualizing all your commitments, Solving workflow problems, Maintaining your responsibilities. This is very useful in planning.