Which is an example of faulty coordination?
A. Important advances were made in the development of planes for bombing and combat, and small aircraft were produced rapidly.
B. Airlines expanded their facilities and trained thousands of students, who became pilots in military air operations.
C. Aircraft designed for personal use were refitted for military use, and civilian pilots were trained for military duty.
D. At the end of the war, airplane production reached an all-time high, and air warfare increased in intensity.