A worker who recently switched from day to swing shift has become less efficient and more irritable. He is also making more mistakes than he did on the day shift. The cause of this worker's problem is likely to be:

Question

a. sleep disorders due to change in shift
b. excessive light on the awing shift
c. external desynchronization and excessive light
d. internal desynchronization.
My answer is C. Can some let me know if I chose the correct answer.