Which if the following is not true regarding the child tax credit?

	a.	The child tax credit can be claimed for a child age 18.
	b.	Before any AGI phase-out, a child tax credit of $2,000 can be claimed for a child age 4.
	c.	Taxpayers must reduce the credit for each child by $50 for each $1,000 (or portion thereof) over the trigger AGI amount.
	d.	The child tax credit is a refundable credit.