After a solution has been selected and planned, the next step is to

a.
evaluate the solution
b.
analyze the solution
c.
monitor the solution’s progress
d.
implement the solution
psychology

D. implement the solution.

Explanation:

If a solution has already been selected and planned, this most likely means you already have enough information to trust the fact that the solution will most likely work. The next necessary step, therefore, would be to actually implement the solution. Once the solution is in place, it is important to monitor it in order to make sure that the results we are getting are in fact the ones that we were expecting.

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