The effects on health can best be reduced by means of a restrictive policy.
The effects on health can best be minimized by following a restrictive policy.
A restrictive policy can help in reducing the effects on health in the best possible way.
A restrictive policy is the best way to reduce the effects on health.
All are correct.
All the given statements are grammatically correct and at the same time, they convey the similar meaning. Hence option (e) is the correct choice