An income guarantee of USD 10,000 per year for all families is established with a phase-out rate of benefits of 50 cents per dollar of earnings. Then it follows that:

a.all families with earnings of less than USD 20,000 per year will receive transfers.

b.only families with earnings of less than USD 10,000 per year will receive transfers.

c.all families with income of less than USD 30,000 per year will receive transfers.

d.all families will receive transfers.