A team of engineers has decided to design a new shoe for people suffering from a painful foot condition. What should the engineers do during the
planning stage of their project?
A. Have patients wear the new shoe in an experimental trial to see if
symptoms improve.
B. Look at the trial's results to see how the design can be improved.
C. Estimate how much potential consumers would be willing to pay
for this new shoe.
O D. Build a variety of shoe models.