Answer:
The most suitable answer here is D. Concurrent Control.
Explanation:
Concurrent control is also known as preventive controls and steering controls where the aim of the control procedure is to identify the possible flaws of a process and to prevent them before occurring.
Furthermore, in this scenario as you can see, Donald consults production manager and formulates measures as the process is ongoing. This makes it more of a "concurrent control" as well.
So Why did we not use any of the other options?
Option A, reactive controls is incorrect in this case, because reactive measures are completely spontaneous actions that respond to an accident.
Option B is incorrect too, because feedback controls are done after a process has been completed and through identification of falls happened.
Option C, feed forward controls are not correct in this scenario as well. Although it is a type of preventive control, in this scenario it is not entirely preventive. They are formulating measures even as the process is ongoing.