A scientist is at the hospital visiting a friend's young daughter, who has been
diagnosed with a respiratory virus. On his way out, he speaks with a nurse
and discovers that the pediatric wing of the hospital was recently converted
into a respiratory disease unit due to the recent rise in respiratory infection.
The scientist realizes that respiratory disease is a serious problem. The
scientist is in which part of the engineering process?
A. Making a plan
B. Doing the plan
C. Knowing the background
D. Identifying a need