[Solved] Economic output per hour worked differs from nation to nation.This is due to all of the following factors except A) economic policies. B) size of the nation. C) human skills. D) traditions. E) natural resources. Clear View: A term denoting an unobstructed and clear line of sight or understanding. Proper Objective: An aim or goal that is suitable and appropriately targeted for a specific task or endeavor. Optical Microscopes: Instruments that use visible light and a system of lenses to magnify small objects, allowing for the observation of details not visible to the naked eye. Physicians' Office Laboratories: Labs located within a physician's office where various tests are performed on clinical specimens to obtain information about the health of a patient.