Bill in the gap with appropriate proposition: A Citizen enjoys a lot of rights in times of peace. But sometimes he has to give (a) ____ some of his…

Bill in the gap with appropriate proposition:

A Citizen enjoys a lot of rights in times of peace. But sometimes he has to give (a) ____ some of his rights and privileges voluntarily in order (b) ____ keep the independence of his country secure. When his country is (c) ____ war his only duty is to switch (d) ____ all his efforts to the defense of his country.