According to zimbabwe’s constitution,
white farmers had to leave their land
white farmers had to pay for infrastructure
white farmers had to pay black farmers for their land
white farmers had to be paid for their land

The Zimbabwe's Constitution has been considered as Zimbabwe's ultimate law. It has been stated that all farms that are white-owned should be prepared for redistribution, and therefore, the answer that fits the given blank above is the first option: the white farmers had to leave their land.