HELP ASAP

Which of these correctly lists the order of the engineering process?
A. Produce a product, improve it, identify a problem, make a solution,
test the solution.

B. Make a solution, identify a problem, research the problem, test the
solution, improve the product, test and evaluate, research, make a
plan, do the plan.

C. Identify a need, research the background, make a plan, do the
work, evaluate the results, look for improvements.