Review Lessons 1 & 2
3. To increase the effectiveness and safety of the work zone and to minimize potential lawsuits, highway and local government officials should:
C) Leave as many signs and traffic control devices up as possible 24 hours a day
Your answer is incorrect.
Actually, it's better to take down temporary signs during non-working hours. For example, If a driver or pedestrian sees a Work Ahead sign when no work is being done, that person may decide to ignore it the next time.