A clock mechanism requires its driven gear to rotate faster than its driving gear and in the opposite direction. The mechanism may use gears that mesh directly or may have an idler gear between the driving and driven gears.
Which statement describes a gear arrangement that meets both requirements?
A small driving gear meshes directly with a larger driven gear.
A large driving gear turns a smaller driven gear through an idler gear.
A small driving gear turns a larger driven gear through an idler gear.
A large driving gear meshes directly with a smaller driven gear.